• 常用幫助文檔

help()
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• 以%開始的函數(shù)，成為魔法函數(shù)，例如加了%的run可以運(yùn)行外部函數(shù)

#在外部新建一個(gè)test.py文件，寫入函數(shù)
def square(x):
    return x ** 2
#運(yùn)行外部函數(shù)
%run test.py
調(diào)用外部函數(shù)
square(2)
out: 4

• timeit 用來測(cè)試一行Python語句的執(zhí)行時(shí)間

%timeit L = [n ** 2 for n in range(100)]
out:
22.5 μs ± 586 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)

#%%timeit 用來測(cè)試多行Python語句的執(zhí)行時(shí)間
%%timeit 
L = []
for n in range(100):
    L.append(n ** 2)
out:
35 μs ± 690 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)

# %debug 用來在交互環(huán)境中調(diào)試程序,運(yùn)行報(bào)錯(cuò)后開啟，打印一些參數(shù)，可以快速找到錯(cuò)誤
%debug


# 查看所有魔法函數(shù)
%lsmagic
out:
Available line magics:
  %alias  %alias_magic  %autoawait  %autocall  %automagic  %autosave  %bookmark  %cd  %clear  %cls  %colors  %conda 
  %config  %connect_info  %copy  %ddir  %debug  %dhist  %dirs  %doctest_mode  %echo  %ed  %edit  %env  %gui  %hist 
  %history  %killbgscripts  %ldir  %less  %load  %load_ext  %loadpy  %logoff  %logon  %logstart  %logstate  %logstop
  %ls  %lsmagic  %macro  %magic  %matplotlib  %mkdir  %more  %notebook  %page  %pastebin  %pdb  %pdef  %pdoc  %pfile
  %pinfo  %pinfo2  %pip  %popd  %pprint  %precision  %prun  %psearch  %psource  %pushd  %pwd  %pycat  %pylab  %qtconsole
  %quickref  %recall  %rehashx  %reload_ext  %ren  %rep  %rerun  %reset  %reset_selective  %rmdir  %run  %save  %sc
  %set_env  %store  %sx  %system  %tb  %time  %timeit  %unalias  %unload_ext  %who  %who_ls  %whos  %xdel  %xmode

Available cell magics:
    %%!  %%HTML  %%SVG  %%bash  %%capture  %%cmd  %%debug  %%file  %%html  %%javascript   %%js  %%latex  %%markdown  %%perl
    %%prun  %%pypy  %%python  %%python2  %%python3  %%ruby  %%script  %%sh  %%svg  %%sx  %%system  %%time  %%timeit
    %%writefile

Automagic is ON, % prefix IS NOT needed for line magics.

• 查看正在運(yùn)行的目錄文件

!cd
out:D:\python-project\data_analysis\Jupyter_learning

• 異?？刂?%xmode:可以在軌跡追溯中找到錯(cuò)誤的原因

# %xmode Plain 以緊湊的方式顯示異常信息
# %xmode Verbose  會(huì)自動(dòng)加入執(zhí)行過程中的額外參數(shù)信息，錯(cuò)誤信息更詳細(xì)
# 默認(rèn) xmode Content