相关疑难解决方法(0)

我有DataFrame df一列，category用下面的代码创建：

import pandas as pd
import random as rand
from string import ascii_uppercase

rand.seed(1010)

df = pd.DataFrame()
values = list()
for i in range(0,1000):   
    category = (''.join(rand.choice(ascii_uppercase) for i in range(1)))
    values.append(category)

df['category'] = values

每个值的频率计数是：

df['category'].value_counts()
Out[95]: 
P    54
B    50
T    48
V    46
I    46
R    45
F    43
K    43
U    41
C    40
W    39
E    39
J    39
X    37
M    37
Q    35
Y    35
Z    34
O …