查看Python及程序包/第三方庫的版本和路徑

一、查看程序包(Packages / Library)的當前版本和路徑（Pandas爲例）

終端命令

pip 命令:

• 列出所有已安裝的程序包: pip list或pip freeze
• 檢查已安裝程序包的詳細信息: pip show <package-name>

conda 命令:conda list

pip show pandas

# Name: pandas
# Version: 1.0.1
# Summary: Powerful data structures for data analysis, time series, and statistics
# Home-page: https://pandas.pydata.org
# Author: None
# Author-email: None
# License: BSD
# Location: /Users/Lemon/opt/anaconda3/lib/python3.7/site-packages
# Requires: python-dateutil, pytz, numpy
# Required-by: statsmodels, seaborn

Python腳本、Jupyter

pd.__version__ 獲取Pandas版本號，其他程序包也適用
pd.__path__ 獲取安裝路徑
pd.show_versions() 輸出詳細信息，包括Python版本和相關程序包以及操作系統類型

import pandas as pd

print(pd.__version__)
# '1.0.1'

print(pd.__path__)
# ['/Users/Lemon/opt/anaconda3/lib/python3.7/site-packages/pandas']

print(pd.show_versions())
# INSTALLED VERSIONS
# ------------------
# commit           : None
# python           : 3.7.6.final.0
# python-bits      : 64
# OS               : Darwin
# OS-release       : 19.4.0
# machine          : x86_64
# processor        : i386
# byteorder        : little
# LC_ALL           : None
# LANG             : zh_CN.UTF-8
# LOCALE           : zh_CN.UTF-8

# pandas           : 1.0.1
# numpy            : 1.18.1
# pytz             : 2019.3
# dateutil         : 2.8.1
# pip              : 20.0.2
# setuptools       : 46.0.0.post20200309
# Cython           : 0.29.15
# pytest           : 5.3.5
# hypothesis       : 5.5.4
# sphinx           : 2.4.0
# blosc            : None
# feather          : None
# xlsxwriter       : 1.2.7
# lxml.etree       : 4.5.0
# html5lib         : 1.0.1
# pymysql          : None
# psycopg2         : None
# jinja2           : 2.11.1
# IPython          : 7.12.0
# pandas_datareader: None
# bs4              : 4.8.2
# bottleneck       : 1.3.2
# fastparquet      : None
# gcsfs            : None
# lxml.etree       : 4.5.0
# matplotlib       : 3.1.3
# numexpr          : 2.7.1
# odfpy            : None
# openpyxl         : 3.0.3
# pandas_gbq       : None
# pyarrow          : None
# pytables         : None
# pytest           : 5.3.5
# pyxlsb           : None
# s3fs             : None
# scipy            : 1.4.1
# sqlalchemy       : 1.3.13
# tables           : 3.6.1
# tabulate         : None
# xarray           : None
# xlrd             : 1.2.0
# xlwt             : 1.3.0
# xlsxwriter       : 1.2.7
# numba            : 0.48.0

二、查看Python版本

終端命令

python --version
# Python 3.7.6

python -V
# Python 3.7.6

python -VV
# Python 3.7.6 (default, Jan  8 2020, 13:42:34)
# [Clang 4.0.1 (tags/RELEASE_401/final)]

python3 -V
# Python 3.7.6

Python腳本

• sys.version 返回字符串，包括Python解釋器的版本號以及有關內部版本號和使用的編譯器的其他信息
• sys.version_info()返回元組形式的Python版本號
• sys.version_info[0]或sys.version_info.major查看是Python2還是Python3
• platform.python_version()返回字符串形式的Python版本號
• platform.python_version_tuple()返回元組形式的Python版本號

import sys

print(sys.version)
# 3.7.6 (default, Jan  8 2020, 13:42:34)
# [Clang 4.0.1 (tags/RELEASE_401/final)]

print(sys.version_info)
# sys.version_info(major=3, minor=7, micro=6, releaselevel='final', serial=0)

print(sys.version_info[0])
print(sys.version_info.major)
# 3

import platform

print(platform.python_version())
# 3.7.6

print(platform.python_version_tuple())
# ('3', '7', '6')

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參考：
Check the version of Python package / library
Check Python version from command line / in script