python3环境下遇到的问题

pip 解决 ImportError: cannot import name 'main'

当 pip 更新至最新版的时候，不管是执行 pip list 还说 pip install packageName 安装包，都会抛出一个异常

Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

那么应该怎么解决呢，其实很简单， 编辑 /usr/bin/pip 文件，修改代码

from pip._internal import main

Not able to pip install pickle in python 3.6

pickle module is part of the standard library in Python for a very long time now so there is no need to install it via pip. I wonder if you IDE or command line is not messed up somehow so that it does not find python installation path. Please check if your %PATH% contains a path to python (e.g. C:\Python36\ or something similar) or if your IDE correctly detects root path where Python is installed.

或者安装

You can pip install pickle by running command pip install pickle-mixin. Proceed to import it using import pickle. This can be then used normally.

 

import tqdm 

安装失败，那就多试试这几个镜像

例如：pip install -i https://pypi.tuna.tsinghua.edu.cn/simple tqdm

清华：https://pypi.tuna.tsinghua.edu.cn/simple

阿里云：http://mirrors.aliyun.com/pypi/simple/

中国科技大学 https://pypi.mirrors.ustc.edu.cn/simple/

华中理工大学：http://pypi.hustunique.com/

山东理工大学：http://pypi.sdutlinux.org/ 

豆瓣：http://pypi.douban.com/simple/

note：新版ubuntu要求使用https源，要注意。

 

今天在ubuntu中安Python3的时候，出现了一个错误：zipimport.ZipImportError: can‘t decompress data; zlib not available

网上找了各种办法都无法解决实际问题，记录下解决过程。

错误：

zipimport.ZipImportError: can't decompress data; zlib not available
Makefile:1079: recipe for target 'install' failed
make: *** [install] Error 1

解决办法：安装依赖

1 sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev \
2 libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev \
3 xz-utils tk-dev

重新 make && make install

python安装pandas库出现 No module named ‘_lzma’