pip常见报错

• 报错1：Command “python setup.py egg_info“ failed with error code 1 in /tmp/pip-build-*

#  解决方案：升级pip
pip install --upgrade pip

• 报错2

[root@bogon home]# pip install tf-nightly
ERROR: Could not find a version that satisfies the requirement tf-nightly (from versions: none)
ERROR: No matching distribution found for tf-nightly

# 解决方案：指定镜像源头
pip install torch==1.4.0 -i https://mirrors.aliyun.com/pypi/simple/

• 报错3：pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='mirrors.aliyun.com', port=443): Read timed out.

# 解决方案
pip install --default-timeout=100 alphabet

• 报错4：ERROR: Could not install packages due to an OSError: [WinError 5] 拒绝访问

# 依赖正在使用，无法更新，先停用再尝试
# 权限不足，使用管理员身份打开cmd安装