Remove duplicate imports

build/pkgs/database_odlyzko_zeta/spkg-install.py

@@ -1,7 +1,6 @@
 import os
 from sage.all import save
 from sage.env import SAGE_SHARE
-import os
 
 install_root = os.path.join(SAGE_SHARE, 'odlyzko')
 target = os.path.join(install_root, 'zeros.sobj')

src/sage/combinat/cluster_algebra_quiver/quiver_mutation_type.py

@@ -2271,7 +2271,6 @@ def _save_data_dig6(n, types='ClassicalExceptional', verbose=False):
         data.update(_construct_exceptional_mutation_classes(n))
 
     from sage.env import DOT_SAGE
-    import os
     types_path = os.path.join(DOT_SAGE, 'cluster_algebra_quiver')
     types_file = os.path.join(types_path, 'mutation_classes_%s.dig6' % n)
     os.makedirs(types_path, exist_ok=True)

src/sage/databases/jones.py

@@ -145,7 +145,6 @@ def _init(self, path):
 
         This takes about 5 seconds.
         """
-        import os
         x = PolynomialRing(RationalField(), 'x').gen()
         self.root = {}
         self.root[tuple([])] = [x - 1]

src/sage/databases/sloane.py

@@ -357,7 +357,6 @@ def copy_gz_file(gz_source, bz_destination):
     - ``bz_destination`` -- string.  The name of the newly compressed file.
     """
     import gzip
-    import os
 
     # Read the gzipped input
     try:

src/sage/interfaces/expect.py

@@ -440,7 +440,6 @@ def _do_cleaner(self):
             return False
 
     def _start(self, alt_message=None, block_during_init=True):
-        import os
         self.quit()  # in case one is already running
 
         self._session_number += 1

src/sage/misc/cachefunc.pyx

@@ -420,7 +420,7 @@ cdef extern from "methodobject.h":
     cdef int PyCFunction_GetFlags(object op) except -1
 
 import os
-from os.path import relpath,normpath,commonprefix
+from os.path import relpath, normpath, commonprefix
 from sage.misc.sageinspect import sage_getfile, sage_getsourcelines, sage_getargspec
 from inspect import isfunction
 
@@ -3348,7 +3348,6 @@ class FileCache(object):
             sage: FC[((),())]
             1
         """
-        import os
         if not dir or dir[-1] != '/':
             dir += '/'
         self._dir = dir

src/sage/misc/func_persist.py

@@ -52,7 +52,6 @@ class func_persist:
     definition to cache values it computes to disk.
     """
     def __init__(self, f, dir='func_persist'):
-        import os
         self.__func = f
         self.__dir = dir
         os.makedirs(dir, exist_ok=True)

src/sage/misc/lazy_import.pyx

@@ -1080,7 +1080,6 @@ def save_cache_file():
         sage: import sage.misc.lazy_import
         sage: sage.misc.lazy_import.save_cache_file()
     """
-    import os
     from sage.misc.temporary_file import atomic_write
 
     global star_imports

src/sage_docbuild/__init__.py

@@ -56,7 +56,6 @@
 
 import sage.all
 from sage.misc.cachefunc import cached_method
-import os
 from sage.env import SAGE_DOC_SRC, SAGE_DOC, SAGE_SRC, DOT_SAGE
 
 from .build_options import (LANGUAGES, SPHINXOPTS, PAPER, OMIT,

src/sage_docbuild/ext/multidocs.py

@@ -26,7 +26,6 @@
 from sphinx.application import Sphinx
 from sphinx.util.console import bold
 from sage.env import SAGE_DOC
-import os
 from pathlib import Path
 
 logger = sphinx.util.logging.getLogger(__name__)