From eceb230da603501f60ea5aee002bee27bfa12ab6 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:00:11 +0100
Subject: [PATCH 01/27] Create capitalize.py

This function will capitalize the first character of a sentence or a word
---
 strings/capitalize.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 strings/capitalize.py

diff --git a/strings/capitalize.py b/strings/capitalize.py
new file mode 100644
index 000000000000..9d8e4935da07
--- /dev/null
+++ b/strings/capitalize.py
@@ -0,0 +1,20 @@
+def capitalize(sentence) -> str:
+    """
+    This function will capitalize the first character of a sentence
+
+    >>> capitalize("hello world") 
+        "Hello world"
+    >>> capitalize("123 hello world)
+        "123 hello world" 
+    >>> capitalize(" hello world") 
+        " hello world" 
+    """
+    
+    first_char = sentence[0]
+    new_sentence = str.upper(first_char) + sentence[1:]
+
+if "__name__" == __main__:
+  from doctest import testmod
+  
+  testmode()
+    

From b624b32e39bf6e8565352987a7a974b1199a324d Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:12:17 +0100
Subject: [PATCH 02/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 9d8e4935da07..71a0a9afedc1 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -13,7 +13,7 @@ def capitalize(sentence) -> str:
     first_char = sentence[0]
     new_sentence = str.upper(first_char) + sentence[1:]
 
-if "__name__" == __main__:
+if __name__ == "__main__":
   from doctest import testmod
   
   testmode()

From fe8a8890e9730a2b2c6070cb6fed660c5335e628 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:31:09 +0100
Subject: [PATCH 03/27] Update capitalize.py

---
 strings/capitalize.py | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 71a0a9afedc1..da2fea4a7a3d 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,20 +1,18 @@
-def capitalize(sentence) -> str:
+def capitalize(str: sentence) -> str:
     """
-    This function will capitalize the first character of a sentence
-
-    >>> capitalize("hello world") 
-        "Hello world"
+    This function will capitalize the first word of a sentence
+    >>> capitalize("hello world")
+        Hello world
     >>> capitalize("123 hello world)
-        "123 hello world" 
-    >>> capitalize(" hello world") 
-        " hello world" 
+        123 hello world
     """
-    
-    first_char = sentence[0]
-    new_sentence = str.upper(first_char) + sentence[1:]
 
-if __name__ == "__main__":
-  from doctest import testmod
-  
-  testmode()
-    
+    sentence = sentence.lsplit()
+    firstChar = sentence[0]
+    if isalpha(firstChar):
+        upperCaseChar = str.upper(firstChar)
+        sentence[0] = str.upper(firstChar)
+    print(sentence)
+
+
+capitalize("hello world")

From d7743f9d00872526e3161c36f39be0addf1fe947 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:37:23 +0100
Subject: [PATCH 04/27] Update capitalize.py

---
 strings/capitalize.py | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index da2fea4a7a3d..591285f04fd5 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,18 +1,21 @@
 def capitalize(str: sentence) -> str:
     """
-    This function will capitalize the first word of a sentence
+    This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
-        Hello world
+        "Hello world"
     >>> capitalize("123 hello world)
-        123 hello world
+        "123 hello world"
+    >>> capitalize(" hello world")
+       " hello world"
     """
 
-    sentence = sentence.lsplit()
-    firstChar = sentence[0]
-    if isalpha(firstChar):
-        upperCaseChar = str.upper(firstChar)
-        sentence[0] = str.upper(firstChar)
-    print(sentence)
+    first_char = sentence[0]
+    new_sentence = str.upper(first_char) + sentence[1:]
+    return new_sentence
 
 
-capitalize("hello world")
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()
+    

From 05bfed6ffbd9fefb3f11928ec377f905afe5940a Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:38:51 +0100
Subject: [PATCH 05/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 591285f04fd5..b784d32a496f 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-def capitalize(str: sentence) -> str:
+def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")

From ef06d3e1d8aaecfe4e5fe3feb9421f4755be1705 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:45:13 +0100
Subject: [PATCH 06/27] Update capitalize.py

---
 strings/capitalize.py | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index b784d32a496f..86aeb5469024 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-def capitalize(sentence: str) -> str:
+def capitalize(str: sentence) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
@@ -8,14 +8,9 @@ def capitalize(sentence: str) -> str:
     >>> capitalize(" hello world")
        " hello world"
     """
-
     first_char = sentence[0]
     new_sentence = str.upper(first_char) + sentence[1:]
     return new_sentence
-
-
 if __name__ == "__main__":
     from doctest import testmod
-
     testmod()
-    

From 7614ae3cd67abc61520c5c5d72b611683dbaf64d Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:50:39 +0100
Subject: [PATCH 07/27] Update capitalize.py

---
 strings/capitalize.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 86aeb5469024..d453f8810dd7 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-def capitalize(str: sentence) -> str:
+def capitalize(sentence:str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
@@ -11,6 +11,8 @@ def capitalize(str: sentence) -> str:
     first_char = sentence[0]
     new_sentence = str.upper(first_char) + sentence[1:]
     return new_sentence
+
+
 if __name__ == "__main__":
     from doctest import testmod
     testmod()

From faf2c4f8ddedb09625c802ae9bf442167101eb3a Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 00:54:48 +0100
Subject: [PATCH 08/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index d453f8810dd7..9f4900415064 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-def capitalize(sentence:str) -> str:
+def capitalize(sentence:str) -> str: 
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")

From 7fc912d68497e982f6f2eecee17f6d2c5237f62c Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:00:12 +0100
Subject: [PATCH 09/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 9f4900415064..092fdd7f09d8 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-def capitalize(sentence:str) -> str: 
+def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")

From 14739c8284c2f1bf8767f64df60c002d28b52cef Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:08:58 +0100
Subject: [PATCH 10/27] Update capitalize.py

---
 strings/capitalize.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 092fdd7f09d8..870464336871 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -2,11 +2,11 @@ def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
-        "Hello world"
+        'Hello world'
     >>> capitalize("123 hello world)
-        "123 hello world"
+        '123 hello world'
     >>> capitalize(" hello world")
-       " hello world"
+       ' hello world'
     """
     first_char = sentence[0]
     new_sentence = str.upper(first_char) + sentence[1:]

From 1af4643a0cb095f3826332649488383e4f8d80d9 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:17:05 +0100
Subject: [PATCH 11/27] Update capitalize.py

---
 strings/capitalize.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 870464336871..d0873d36f30b 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -15,4 +15,5 @@ def capitalize(sentence: str) -> str:
 
 if __name__ == "__main__":
     from doctest import testmod
+
     testmod()

From b0fa4277e59b77929e9732d03641a8cc57e4ca5b Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:24:12 +0100
Subject: [PATCH 12/27] Update capitalize.py

---
 strings/capitalize.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index d0873d36f30b..daa6410c3dfd 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -2,11 +2,11 @@ def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
-        'Hello world'
+    'Hello world'
     >>> capitalize("123 hello world)
-        '123 hello world'
+    '123 hello world'
     >>> capitalize(" hello world")
-       ' hello world'
+    ' hello world'
     """
     first_char = sentence[0]
     new_sentence = str.upper(first_char) + sentence[1:]

From 72466cb132b9130eceaa9aec616ba1eb1e458e7a Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 01:30:46 +0100
Subject: [PATCH 13/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index daa6410c3dfd..493717509675 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -3,7 +3,7 @@ def capitalize(sentence: str) -> str:
     This function will capitalize the first letter of a sentence or a word
     >>> capitalize("hello world")
     'Hello world'
-    >>> capitalize("123 hello world)
+    >>> capitalize("123 hello world")
     '123 hello world'
     >>> capitalize(" hello world")
     ' hello world'

From 52026cb4739caaa5e393454707b3fe0924d24eab Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 11:38:25 +0100
Subject: [PATCH 14/27] Update capitalize.py

---
 strings/capitalize.py | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 493717509675..4933bce921d3 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,3 +1,5 @@
+import string
+
 def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
@@ -8,8 +10,20 @@ def capitalize(sentence: str) -> str:
     >>> capitalize(" hello world")
     ' hello world'
     """
-    first_char = sentence[0]
-    new_sentence = str.upper(first_char) + sentence[1:]
+    
+    """
+    Creates a new dictionary which keys are lowercase letters and the values are their corresponding uppercase letter.
+    It gets the first character of the sentence and if that character is a key in the dictionary, it gets the value 
+    and use it as the first character of the sentence.
+    """
+    first_letter = sentence[0]
+    lower_upper_dict = dict()
+    for lower, upper in zip(string.ascii_lowercase, string.ascii_uppercase): 
+        lower_upper_dict[lower] = upper
+    if first_letter in lower_upper_dict:
+        new_sentence = lower_upper_dict[first_letter] + sentence[1:] 
+    else:
+        new_sentence = sentence
     return new_sentence
 
 

From 9b67566b5991764ca70acff6fd3fe4f8ed642f60 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 11:48:38 +0100
Subject: [PATCH 15/27] Update capitalize.py

---
 strings/capitalize.py | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 4933bce921d3..2511efe99b55 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,5 +1,6 @@
 import string
 
+
 def capitalize(sentence: str) -> str:
     """
     This function will capitalize the first letter of a sentence or a word
@@ -10,18 +11,14 @@ def capitalize(sentence: str) -> str:
     >>> capitalize(" hello world")
     ' hello world'
     """
-    
-    """
-    Creates a new dictionary which keys are lowercase letters and the values are their corresponding uppercase letter.
-    It gets the first character of the sentence and if that character is a key in the dictionary, it gets the value 
-    and use it as the first character of the sentence.
-    """
     first_letter = sentence[0]
     lower_upper_dict = dict()
-    for lower, upper in zip(string.ascii_lowercase, string.ascii_uppercase): 
-        lower_upper_dict[lower] = upper
+    for lower, upper in zip(string.ascii_lowercase, string.ascii_uppercase):
+        lower_upper_dict[
+            lower
+        ] = upper  # dict keys are lower case letters and their value are corressponding uppercase letter
     if first_letter in lower_upper_dict:
-        new_sentence = lower_upper_dict[first_letter] + sentence[1:] 
+        new_sentence = lower_upper_dict[first_letter] + sentence[1:]
     else:
         new_sentence = sentence
     return new_sentence

From 3815a304f8167bba5ceb2c495f209b4d0ae56c44 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 11:52:43 +0100
Subject: [PATCH 16/27] Update capitalize.py

---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 2511efe99b55..04738b464da2 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -16,7 +16,7 @@ def capitalize(sentence: str) -> str:
     for lower, upper in zip(string.ascii_lowercase, string.ascii_uppercase):
         lower_upper_dict[
             lower
-        ] = upper  # dict keys are lower case letters and their value are corressponding uppercase letter
+        ] = upper  # dict keys are lower case letters and their value are corresponding uppercase letter
     if first_letter in lower_upper_dict:
         new_sentence = lower_upper_dict[first_letter] + sentence[1:]
     else:

From 7e6150eb325ba96dfd78b7435c16992e363b5b41 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 12:00:20 +0100
Subject: [PATCH 17/27] Update strings/capitalize.py

Co-authored-by: Christian Clauss <cclauss@me.com>
---
 strings/capitalize.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 04738b464da2..689c234612e8 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -1,4 +1,4 @@
-import string
+from string import ascii_lowercase, ascii_uppercase
 
 
 def capitalize(sentence: str) -> str:

From 16e864c4764ef8aa5923690f6396a4730026e325 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 12:02:15 +0100
Subject: [PATCH 18/27] Update capitalize.py

---
 strings/capitalize.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 689c234612e8..446656a95ccb 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -13,10 +13,9 @@ def capitalize(sentence: str) -> str:
     """
     first_letter = sentence[0]
     lower_upper_dict = dict()
-    for lower, upper in zip(string.ascii_lowercase, string.ascii_uppercase):
-        lower_upper_dict[
-            lower
-        ] = upper  # dict keys are lower case letters and their value are corresponding uppercase letter
+    lower_upper_dict = {
+        lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
+    }
     if first_letter in lower_upper_dict:
         new_sentence = lower_upper_dict[first_letter] + sentence[1:]
     else:

From cf7369603594394d55a1070339679f3be4fcc151 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 12:17:58 +0100
Subject: [PATCH 19/27] Update strings/capitalize.py

Co-authored-by: Christian Clauss <cclauss@me.com>
---
 strings/capitalize.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 446656a95ccb..d851c9bf1fb2 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -12,7 +12,6 @@ def capitalize(sentence: str) -> str:
     ' hello world'
     """
     first_letter = sentence[0]
-    lower_upper_dict = dict()
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }

From d26811bab4e919621c0eb07ad75f555e1d074c6f Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 13:14:38 +0100
Subject: [PATCH 20/27] Update capitalize.py

---
 strings/capitalize.py | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index d851c9bf1fb2..e4a18515e608 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -11,15 +11,10 @@ def capitalize(sentence: str) -> str:
     >>> capitalize(" hello world")
     ' hello world'
     """
-    first_letter = sentence[0]
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }
-    if first_letter in lower_upper_dict:
-        new_sentence = lower_upper_dict[first_letter] + sentence[1:]
-    else:
-        new_sentence = sentence
-    return new_sentence
+    return lower_upper_dict.get(sentence[0], sentence[0]) + sentence[1:]
 
 
 if __name__ == "__main__":

From 36f3fdcfc897083dd631bbec70f79f3040afcde5 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 13:46:20 +0100
Subject: [PATCH 21/27] Update capitalize.py

---
 strings/capitalize.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index e4a18515e608..5ded50fd7a91 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -10,11 +10,20 @@ def capitalize(sentence: str) -> str:
     '123 hello world'
     >>> capitalize(" hello world")
     ' hello world'
+    >>> capitalize("a")
+    'A'
+    >>> capitalize("")
+    ''
     """
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }
-    return lower_upper_dict.get(sentence[0], sentence[0]) + sentence[1:]
+    return (
+        lower_upper_dict.get(sentence[0], sentence[0])
+        + (sentence[1:] if (len(sentence) >= 1) else "")
+        if (len(sentence) != 0)
+        else ""
+    )
 
 
 if __name__ == "__main__":

From f9ee3ed8a1433df676bfbf3c0cec5941e6312da7 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 13:48:50 +0100
Subject: [PATCH 22/27] Update capitalize.py

---
 strings/capitalize.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 5ded50fd7a91..bc3a001101d6 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -20,9 +20,9 @@ def capitalize(sentence: str) -> str:
     }
     return (
         lower_upper_dict.get(sentence[0], sentence[0])
-        + (sentence[1:] if (len(sentence) >= 1) else "")
+        + (sentence[1:] if (len(sentence) >= 1) else '')
         if (len(sentence) != 0)
-        else ""
+        else ''
     )
 
 

From ef447daae4a2ace82ef6c46a5582f9a440380272 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 14:00:48 +0100
Subject: [PATCH 23/27] Update strings/capitalize.py

Co-authored-by: Christian Clauss <cclauss@me.com>
---
 strings/capitalize.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index bc3a001101d6..8f5cccec83ae 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -15,6 +15,8 @@ def capitalize(sentence: str) -> str:
     >>> capitalize("")
     ''
     """
+    if not sentence:
+        return ""
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }

From a1bfd69b9e381161ccdfa912959aeee459e2133e Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 14:01:35 +0100
Subject: [PATCH 24/27] Update capitalize.py

---
 strings/capitalize.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index 8f5cccec83ae..eb0370d05dee 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -16,15 +16,13 @@ def capitalize(sentence: str) -> str:
     ''
     """
     if not sentence:
-        return ""
+        return ''
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }
     return (
         lower_upper_dict.get(sentence[0], sentence[0])
         + (sentence[1:] if (len(sentence) >= 1) else '')
-        if (len(sentence) != 0)
-        else ''
     )
 
 

From 9864e9f09d0f23d013e14114e70ee336f81955e4 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 14:12:43 +0100
Subject: [PATCH 25/27] Update strings/capitalize.py

Co-authored-by: Christian Clauss <cclauss@me.com>
---
 strings/capitalize.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index eb0370d05dee..a13361992f9f 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -17,6 +17,8 @@ def capitalize(sentence: str) -> str:
     """
     if not sentence:
         return ''
+    if not sentence:
+        return ""
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }

From 7a8de146d0e79e2c4ec219f287b4bec57c0fc249 Mon Sep 17 00:00:00 2001
From: mohammadreza490 <47437328+mohammadreza490@users.noreply.github.com>
Date: Thu, 3 Sep 2020 14:13:12 +0100
Subject: [PATCH 26/27] Update capitalize.py

---
 strings/capitalize.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index a13361992f9f..eb0370d05dee 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -17,8 +17,6 @@ def capitalize(sentence: str) -> str:
     """
     if not sentence:
         return ''
-    if not sentence:
-        return ""
     lower_upper_dict = {
         lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
     }

From cfa8839813526327b4eedb5f17b042989bb6c0ac Mon Sep 17 00:00:00 2001
From: Christian Clauss <cclauss@me.com>
Date: Thu, 3 Sep 2020 15:29:48 +0200
Subject: [PATCH 27/27] Update capitalize.py

---
 strings/capitalize.py | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/strings/capitalize.py b/strings/capitalize.py
index eb0370d05dee..2a84a325bca4 100644
--- a/strings/capitalize.py
+++ b/strings/capitalize.py
@@ -17,13 +17,8 @@ def capitalize(sentence: str) -> str:
     """
     if not sentence:
         return ''
-    lower_upper_dict = {
-        lower: upper for lower, upper in zip(ascii_lowercase, ascii_uppercase)
-    }
-    return (
-        lower_upper_dict.get(sentence[0], sentence[0])
-        + (sentence[1:] if (len(sentence) >= 1) else '')
-    )
+    lower_to_upper = {lc: uc for lc, uc in zip(ascii_lowercase, ascii_uppercase)}
+    return lower_to_upper.get(sentence[0], sentence[0]) + sentence[1:]
 
 
 if __name__ == "__main__":