之前文章，提供了10個(gè)學(xué)習(xí)小案例，今天再分享一些。

Case1 將溫度在某個(gè)區(qū)間置為1，不在區(qū)間為0

data = {'Day':  [1,2,3,4],
        'Temperature': [20,30,40,50]
        }

    Day Temperature
0   1   20
1   2   30
2   3   40
3   4   50

df['Temperature'] = np.where(df['Temperature'].between(25, 45), 1, 0)

  Day   Temperature
0   1   0
1   2   1
2   3   1
3   4   0

Case2 去除所有帶有特殊字符的列

 X1  X2_nan      x3  x4_nan
 34       0    65.8       1
 35       1  5432.1       1
 87       1   443.1       0
 65       0   213.3       0

df = df.loc[:， ~df.columns.astype(str).str.contains('nan')]

X1      x3
0  34    65.8
1  35  5432.1
2  87   443.1
3  65   213.3