Pip Exception

Traceback (most recent call last):
  File "f:\USER\programs\lib\runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "f:\USER\programs\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "F:\USER\programs\scripts\pip.exe\__main__.py", line 5, in <module>
  File "f:\USER\programs\lib\site-packages\pip\_internal\__init__.py", line 4
0, in <module>
    from pip._internal.cli.autocompletion import autocomplete
  File "f:\USER\programs\lib\site-packages\pip\_internal\cli\autocompletion.p
y", line 8, in <module>
    from pip._internal.cli.main_parser import create_main_parser
  File "f:\USER\programs\lib\site-packages\pip\_internal\cli\main_parser.py",
 line 8, in <module>
    from pip._internal.cli import cmdoptions
  File "f:\USER\programs\lib\site-packages\pip\_internal\cli\cmdoptions.py",
line 22, in <module>
    from pip._internal.utils.hashes import STRONG_HASHES
  File "f:\USER\programs\lib\site-packages\pip\_internal\utils\hashes.py", li
ne 10, in <module>
    from pip._internal.utils.misc import read_chunks
  File "f:\USER\programs\lib\site-packages\pip\_internal\utils\misc.py", line
 14, in <module>
    import subprocess
  File "f:\USER\programs\lib\subprocess.py", line 515, in <module>
    def call(*popenargs, **kwargs):
NameError: name 'de' is not defined