遇到个小白常见的问题，发现度娘里面没有记录，翻墙谷歌了下，解决问题，在此写个说明。
事情起因：
在jupyter notebook中导入文件时发生了错误：
%load p2_test1.py
错误信息：
---------------------------------------------------------------------------
NameError Traceback (most recent call last)
/usr/local/lib/python3.5/dist-packages/IPython/core/interactiveshell.py in find_user_code(self, target, raw, py_only, skip_encoding_cookie, search_ns)
3586 try: # User namespace
-> 3587 codeobj = eval(target, self.user_ns)
3588 except Exception:
<string> in <module>
NameError: name 'p2_test1' is not defined
During handling of the above exception, another exception occurred:
ValueError Traceback (most recent call last)
<ipython-input-1-e4e531e2ca85> in <module>
----> 1 get_ipython().run_line_magic('load', 'p2_test1.py')
/usr/local/lib/python3.5/dist-packages/IPython/core/interactiveshell.py in run_line_magic(self, magic_name, line, _stack_depth)
2285 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
2286 with self.builtin_trap:
-> 2287 result = fn(*args,**kwargs)
2288 return result
2289
<decorator-gen-47> in load(self, arg_s)
/usr/local/lib/python3.5/dist-packages/IPython/core/magic.py in <lambda>(f, *a, **k)
185 # but it's overkill for just that one bit of state.
186 def magic_deco(arg):
--> 187 call = lambda f, *a, **k: f(*a, **k)
188
189 if callable(arg):
/usr/local/lib/python3.5/dist-packages/IPython/core/magics/code.py in load(self, arg_s)
333 search_ns = 'n' in opts
334
--> 335 contents = self.shell.find_user_code(args, search_ns=search_ns)
336
337 if 's' in opts:
/usr/local/lib/python3.5/dist-packages/IPython/core/interactiveshell.py in find_user_code(self, target, raw, py_only, skip_encoding_cookie, search_ns)
3588 except Exception:
3589 raise ValueError(("'%s' was not found in history, as a file, url, "
-> 3590 "nor in the user namespace.") % target)
3591
3592 if isinstance(codeobj, str):
ValueError: 'p2_test1.py' was not found in history, as a file, url, nor in the user namespace.
出现这个问题是因为解释器找不到对应的文件。念了“妈咪妈咪轰”pwd后，发现问题所在：
%pwd ll
pwd显示当前目录不是该文件所在的目录。这下明白了，使用咒语要谨慎，记得在念“妈咪妈咪轰”load前，要cd到该文件的目录下去。
参考
补充：Jupyter Notebook - sns.load_dataset加载文件错误解决方法
seaborn模块中sns.load_dataset加载文件错误解决方法：
import seaborn as sns
data = sns.load_dataset("iris")
出现错误：
URLError: <urlopen error [Errno 11004] getaddrinfo failed>
出现原因：
seaborn-data文件夹里面是空的，可以另外下载该文件夹的内容复制到该文件夹中。
下载地址：
https://github.com/mwaskom/seaborn-data
下载位置：
电脑上搜索seaborn-data文件夹
将下载下来的文件解压后全部放进seaborn-data文件夹
重新运行代码，出现结果。
以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。
