Merge pull request #231 from best-practice-and-impact/227-write_workb…

…ook-errors-with-all-integer-table

Casts columns to string before checking for special characters

.github/workflows/ci.yml

@@ -50,6 +50,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+
 
     steps:
     - uses: actions/checkout@v2
@@ -71,7 +72,8 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+
 
     steps:
     - uses: actions/checkout@v2

gptables/core/wrappers.py

@@ -504,7 +504,7 @@ def _write_table_elements(self, pos, gptable, auto_width):
             warnings.warn(msg)
 
         # Raise error if any table element is only special characters
-        if gptable.table.stack().str.contains('^[^a-zA-Z0-9]*$').any():
+        if gptable.table.astype("string").stack().str.contains('^[^a-zA-Z0-9]*$').any():
             msg = (f"""
             Cell found in {gptable.table_name} containing only special characters,
             replace with alphanumeric characters before inputting to GPTable.

gptables/test/test_wrappers.py

@@ -241,6 +241,14 @@ def test__write_empty_table(self, testbook, create_gptable_with_kwargs):
         with pytest.raises(ValueError):
             testbook.ws._write_table_elements([0,0], gptable, auto_width=True)
 
+    def test__write_integer_table(self, testbook, create_gptable_with_kwargs):
+        gptable = create_gptable_with_kwargs({
+            "table": pd.DataFrame({"a": [0], "b": [1]})
+        })
+
+        #Testing that this function executes with no errors
+        testbook.ws._write_table_elements([0,0], gptable, auto_width=True)
+
 
     @pytest.mark.parametrize("cell_value1,cell_value2,expectation", [
         (None, "valid text", pytest.warns(UserWarning)),