例如，我有一个将二进制数转换为十进制的函数，以及另一个将十进制数转换为二进制数的函数。然后，我有另一个函数来检查二进制和十进制数字是否匹配（都表示相同的数字）。这三个操作必须是单独的功能。我需要检查函数中的二进制函数值和十进制函数的值来检查它们。
我可以使用返回值吗？我不想使用全局变量。抱歉，这是一个愚蠢的问题，因为我是函数新手。
答案 0 :(得分：0)
您可以使用int double之类的函数并返回输出。它可以用作普通变量，但可以在其中进行计算。
[root@localhost site-packages] pyenv virtualenv 2.7.12 nanovar
New python executable in /root/.pyenv/versions/2.7.12/envs/nanovar/bin/python2.7
Also creating executable in /root/.pyenv/versions/2.7.12/envs/nanovar/bin/python
Installing setuptools, pip, wheel...
Complete output from command /root/.pyenv/version...anovar/bin/python2.7 - setuptools pip wheel:
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Created temporary directory: /tmp/pip-ephem-wheel-cache-gFPfrS
Created temporary directory: /tmp/pip-req-tracker-UI5fK2
Created requirements tracker '/tmp/pip-req-tracker-UI5fK2'
Created temporary directory: /tmp/pip-install-Ck6zPW
Looking in links: /root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support
Collecting setuptools
1 location(s) to search for versions of setuptools:
* https://pypi.org/simple/setuptools/
Skipping link /root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support (from -f); not a file
Getting page https://pypi.org/simple/setuptools/
Looking up "https://pypi.org/simple/setuptools/" in the cache
Request header has "max_age" as 0, cache bypassed
Cleaning up...
Removed build tracker '/tmp/pip-req-tracker-UI5fK2'
ERROR: Exception:
Traceback (most recent call last):
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/cli/base_command.py", line 178, in main
status = self.run(options, args)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/commands/install.py", line 352, in run
resolver.resolve(requirement_set)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/resolve.py", line 131, in resolve
self._resolve_one(requirement_set, req)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/resolve.py", line 294, in _resolve_one
abstract_dist = self._get_abstract_dist_for(req_to_install)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/resolve.py", line 242, in _get_abstract_dist_for
self.require_hashes
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/operations/prepare.py", line 282, in prepare_linked_requirement
req.populate_link(finder, upgrade_allowed, require_hashes)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/req/req_install.py", line 198, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 766, in find_requirement
candidates = self.find_candidates(req.name, req.specifier)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 752, in find_candidates
self.find_all_candidates(project_name),
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 716, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 846, in _get_pages
page = _get_html_page(location, session=self.session)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 231, in _get_html_page
resp = _get_html_response(url, session=session)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/index.py", line 179, in _get_html_response
"Cache-Control": "max-age=0",
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/requests/sessions.py", line 546, in get
return self.request('GET', url, **kwargs)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_internal/download.py", line 439, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/cachecontrol/adapter.py", line 51, in send
request.headers.update(self.controller.conditional_headers(request))
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/cachecontrol/controller.py", line 233, in conditional_headers
resp = self.serializer.loads(request, self.cache.get(cache_url))
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/cachecontrol/serialize.py", line 97, in loads
return getattr(self, "_loads_v{}".format(ver))(request, data)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/cachecontrol/serialize.py", line 161, in _loads_v2
cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"])
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv_support/pip-19.1.1-py2.py3-none-any.whl/pip/_vendor/cachecontrol/serialize.py", line 13, in _b64_decode_bytes
return base64.b64decode(b.encode("ascii"))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-57970: ordinal not in range(128)
----------------------------------------
...Installing setuptools, pip, wheel...done.
Traceback (most recent call last):
File "/root/.pyenv/versions/2.7.12/bin/virtualenv", line 11, in <module>
sys.exit(main())
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv.py", line 870, in main
symlink=options.symlink,
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv.py", line 1173, in create_environment
install_wheel(to_install, py_executable, search_dirs, download=download)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv.py", line 1019, in install_wheel
_install_wheel_with_search_dir(download, project_names, py_executable, search_dirs)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv.py", line 1110, in _install_wheel_with_search_dir
call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=script)
File "/root/.pyenv/versions/2.7.12/lib/python2.7/site-packages/virtualenv.py", line 963, in call_subprocess
raise OSError("Command {} failed with error code {}".format(cmd_desc, proc.returncode))
OSError: Command /root/.pyenv/version...anovar/bin/python2.7 - setuptools pip wheel failed with error code 2
Ignoring indexes: https://pypi.python.org/simple
Collecting setuptools
Collecting pip
Installing collected packages: setuptools, pip
Successfully installed pip-8.1.1 setuptools-20.10.1