python重新安装以前模块_Python安装、卸载第三方模块

pip command ModuleName

command：用于指定要执行的命令(install：安装，uninstall：卸载)

ModuleName：需要安装的模块名称

示例：

安装第三方模块numpy模块(用于科学计算)：

C:\Users> pip install numpy

Collecting numpy

Downloading https://files.pythonhosted.org/packages/96/d6/53a59338c613e0c3ec7e3052bbf068a5457a005a5f7ad4ae005167c3597e/numpy-1.15.2-cp37-none-win_amd64.whl (13.5MB)

100% |████████████████████████████████| 13.5MB 1.3MB/s

Installing collected packages: numpy

Successfully installed numpy-1.15.2

卸载numpy模块：

C:\Users> pip uninstall numpy

Uninstalling numpy-1.15.2:

Would remove:

d:\python\lib\site-packages\numpy-1.15.2.dist-info\*

d:\python\lib\site-packages\numpy\*

d:\python\scripts\f2py.py

Proceed (y/n)? y

Successfully uninstalled numpy-1.15.2

多学两招

如果想要查看本机Python中都有哪些模块(包括标准模块和第三方模块)，可以在IDE中输入以下命令

print(help('modules'))

执行结果：

Please wait a moment while I gather a list of all available modules...

Demo _thread getpass secrets

Demo2 _threading_local gettext select

Demo3 _tkinter glob selectors

Demo4 _tracemalloc gzip setuptools

__future__ _warnings hashlib shelve

_abc _weakref heapq shlex

_ast _weakrefset hmac shutil

_asyncio _winapi html signal

_bisect abc http site

_blake2 aifc idlelib sitecustomize

_bootlocale antigravity imaplib smtpd

_bz2 argparse imghdr smtplib

_codecs array imp sndhdr

_codecs_cn ast importlib socket

_codecs_hk asynchat inspect socketserver

_codecs_iso2022 asyncio io sqlite3

_codecs_jp asyncore ipaddress sre_compile

_codecs_kr atexit itertools sre_constants

_codecs_tw audioop json sre_parse

_collections backend_interagg keyword ssl

_collections_abc base64 lib2to3 stat

_compat_pickle bdb linecache statistics

_compression binascii locale string

_contextvars binhex logging stringprep

_csv bisect lzma struct

_ctypes builtins macpath subprocess

_ctypes_test bz2 mailbox sunau

_datetime cProfile mailcap symbol

_decimal calendar marshal symtable

_distutils_findvs cgi math sys

_dummy_thread cgitb mimetypes sysconfig

_elementtree chunk mmap tabnanny

_functools cmath modulefinder tarfile

_hashlib cmd msilib telnetlib

_heapq code msvcrt tempfile

_imp codecs multiprocessing test

_io codeop netrc textwrap

_json collections nntplib this

_locale colorsys nt threading

_lsprof compileall ntpath time

_lzma concurrent nturl2path timeit

_markupbase configparser numbers tkinter

_md5 contextlib opcode token

_msi contextvars operator tokenize

_multibytecodec copy optparse trace

_multiprocessing copyreg os traceback

_opcode crypt parser tracemalloc

_operator csv pathlib tty

_osx_support ctypes pdb turtle

_overlapped curses pickle turtledemo

_pickle dataclasses pickletools types

_py_abc datetime pip typing

_pydecimal dbm pipes unicodedata

_pyio decimal pkg_resources unittest

_queue difflib pkgutil urllib

_random dis platform uu

_sha1 distutils plistlib uuid

_sha256 doctest poplib venv

_sha3 dummy_threading posixpath warnings

_sha512 easy_install pprint wave

_signal email profile weakref

_sitebuiltins encodings pstats webbrowser

_socket ensurepip pty winreg

_sqlite3 enum py_compile winsound

_sre errno pyclbr wsgiref

_ssl faulthandler pydoc xdrlib

_stat filecmp pydoc_data xml

_string fileinput pyexpat xmlrpc

_strptime fnmatch queue xxsubtype

_struct formatter quopri zipapp

_symtable fractions random zipfile

_testbuffer ftplib re zipimport

_testcapi functools reprlib zlib

_testconsole gc rlcompleter

_testimportmultiple genericpath runpy

_testmultiphase getopt sched

Enter any module name to get more help. Or, type "modules spam" to search

for modules whose name or summary contain the string "spam".

None

随着时间的过度，结果可能不一样(官方可能进行，增、删、改)

查看本机已安装的第三方模块，可以在命令窗口(cmd)中输入pip list命令将会展示已安装的所有模块：

C:\Users> pip list

Package Version

---------- -------

pip 18.0

setuptools 39.0.1