最近在学习基于python的数据分析，会使用pandas模块，但是在使用pip安装pandas的时候，老是碰到以以下错误
 
C:\Users\fr>pip install pandas
Collecting pandas
  Downloading pandas-1.1.0-cp37-cp37m-win_amd64.whl (9.4 MB)
     |█████████████                   | 3.8 MB 11 kB/s eta 0:08:24ERROR: Exception:
Traceback (most recent call last):
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 425, in _error_catcher
    yield
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 507, in read
    data = self._fp.read(amt) if not fp_closed else b""
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 62, in read
    data = self.__fp.read(amt)
  File "d:\tools\python\python37\lib\http\client.py", line 457, in read
    n = self.readinto(b)
  File "d:\tools\python\python37\lib\http\client.py", line 501, in readinto
    n = self.fp.readinto(b)
  File "d:\tools\python\python37\lib\socket.py", line 589, in readinto
    return self._sock.recv_into(b)
  File "d:\tools\python\python37\lib\ssl.py", line 1071, in recv_into
    return self.read(nbytes, buffer)
  File "d:\tools\python\python37\lib\ssl.py", line 929, in read
    return self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\cli\base_command.py", line 188, in _main
    status = self.run(options, args)
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\cli\req_command.py", line 185, in wrapper
    return func(self, options, args)
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\commands\install.py", line 333, in run
    reqs, check_supported_wheels=not options.target_dir
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 179, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 362, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 314, in _get_abstract_dist_for
    abstract_dist = self.preparer.prepare_linked_requirement(req)
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\operations\prepare.py", line 469, in prepare_linked_requirement
    hashes=hashes,
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\operations\prepare.py", line 259, in unpack_url
    hashes=hashes,
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\operations\prepare.py", line 130, in get_http_url
    link, downloader, temp_dir.path, hashes
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\operations\prepare.py", line 281, in _download_http_url
    for chunk in download.chunks:
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\cli\progress_bars.py", line 166, in iter
    for x in it:
  File "d:\tools\python\python37\lib\site-packages\pip\_internal\network\utils.py", line 39, in response_chunks
    decode_content=False,
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 564, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 529, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "d:\tools\python\python37\lib\contextlib.py", line 130, in __exit__
    self.gen.throw(type, value, traceback)
  File "d:\tools\python\python37\lib\site-packages\pip\_vendor\urllib3\response.py", line 430, in _error_catcher
    raise ReadTimeoutError(self._pool, None, "Read timed out.")
pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.
 
以上的错误发生，其实是由于超时引起的。其问题的根源在于网络，当然网络的问题可能不是能解决了的。那该怎么做呢，其实解决的方案也比较简单就是我们在使用pip下载资源包的时候，通过指定超时的限定，这里我设置–default-timeout=1000，也就是延长超时时间来解决。具体操作如下：
 
C:\Users\fr>pip --default-timeout=1000 install -U pandas
Collecting pandas
  Downloading pandas-1.1.0-cp37-cp37m-win_amd64.whl (9.4 MB)
     |████████████████████████████████| 9.4 MB 10.0 kB/s
Collecting pytz>=2017.2
  Downloading pytz-2020.1-py2.py3-none-any.whl (510 kB)
     |████████████████████████████████| 510 kB 11 kB/s
Collecting numpy>=1.15.4
  Downloading numpy-1.19.1-cp37-cp37m-win_amd64.whl (12.9 MB)
     |████████████████████████████████| 12.9 MB 16 kB/s
Collecting python-dateutil>=2.7.3
  Downloading python_dateutil-2.8.1-py2.py3-none-any.whl (227 kB)
     |████████████████████████████████| 227 kB 12 kB/s
Requirement already satisfied, skipping upgrade: six>=1.5 in d:\tools\python\python37\lib\site-packages (from python-dateutil>=2.7.3->pandas) (1.14.0)
Installing collected packages: pytz, numpy, python-dateutil, pandas
Successfully installed numpy-1.19.1 pandas-1.1.0 python-dateutil-2.8.1 pytz-2020.1
 
希望，我的一点点经验能够帮助到你！！

pc pandas 导入不成功
 
在终端或者cmd里输入 pip install pandas
 如果是python的虚拟环境下执行，需要先激活该虚拟环境后再输入上面的命令。
 因为你电脑里没有安装pandas，所以无法运行。

目录
 
1、PyCharm运行报错信息：（检查有没有下载pandas，没有下载请转2）
 
2、下载pandas（第一步）
 

1、PyCharm运行报错信息：（检查有没有下载pandas，没有下载请转2）
 
ModuleNotFoundError: No module named 'xxxx'的解决办法
 
 
如图所示：是我的报错信息~意思是没有pandas
 
我按照网上找的步骤已经下载了pandas，可是还是报错，PyCharm的settings（ File->settings->project:当前项目名->Project Interpreter）里面还是没有pandas，只有两个默认的文件“pip”和“setuptools”，如图，索引自己的python.exe路径即可
 
 
 
 
 
这里不只有两个文件了，一下子多了很多
 
2、下载pandas（第一步）
 
小伙伴们是不是还不知道怎么下载pandas，cmd命令一直下载不成功，没关系我教你
 
 
如果你可以使用外网，公司对网络没有限制，那么很轻松，你可以直接点+号，搜索pandas即可，如果只能用内部网络乖乖使用下面方法下载，参考网址
 
1）打开cmd
 
输入命令 pip install pandas
 
不行的话就换个镜像源 pip install pandas -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 
有的推荐豆瓣网，但是我司就是打不开，你最好先看看后缀网址是否能打开，如图：
 
 
哈哈哈哈，一切都那么完美，我初学python，感觉一步一个坑，谢谢大家，希望你们能在python的路上越走越高，耶！！！ 

看了好多资料，发现都不建议用python3以上的，不过由于牵扯许多东西，所以没办法卸载重装，参考了多个资料后，最后成功下载了pandas。下边是我的一些总结：
在其中找到合适自己的pandas版本 ：     https://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib
我装的是python34 系统是64位所以我下载了

pandas‑0.22.0‑cp34‑cp34m‑win_amd64.whl
将其下载到自己python34目录下的scripts 中，然后再在DOS窗口中不断cd  找到该目录，然后pip install 

pandas‑0.22.0‑cp34‑cp34m‑win_amd64.whl


 当然，在下载pandas前先应该进行下载pip，从下边网址中下载pip-7.1.2.tar.gz，然后解压。打开DOS窗口，进入该文件夹目录下。如
   然后进入pip-10.0.1文件夹下。然后
 ，然后下载成功。


 


pandas 下载成功后应该在下载其依赖的一些包，比如 numpy dateutil， numexpr, bottleneck, scipy, matplotlib, pytables等，其都可以在https://www.lfd.uci.edu/~gohlke/pythonlibs/#matplotlib  中找到，当然，得要找到相匹配的版本。找到后下载到python34下的scripts文件夹中，还是在DOS窗口中用pip install 进行命令下载。