我有一个字节对象，我想把它翻译成字符串。
请看这个熊猫数据帧：
In [19]: a
Out[19]:
tk sec usec bp1 bp2 bp3 bp4 bp5 ap1 ap2 ... as1 as2 as3 as4 as5 lp amt ls vol oi
0 b'ZN2106' 1619743523 646104 21920.0 21915.0 21910.0 21905.0 21900.0 21930.0 21935.0 ... 11 5 3 8 3 21930.0 1.642792e+10 0 149210 96841
1 b'ZN2106x0010250x0009' 1619744401 684254 21935.0 21930.0 21925.0 21920.0 21910.0 21940.0 21945.0 ... 1 8 3 3 17 21940.0 1.642990e+10 0 149228 96843
2 b'ZN2106x0016750x009' 1619744402 319044 21940.0 21935.0 21930.0 21925.0 21920.0 21945.0 21950.0 ... 1 1 6 1 13 21940.0 1.643615e+10 0 149285 96829
3 b'ZN2106x0014750x0009' 1619744403 422966 21945.0 21940.0 21935.0 21930.0 21925.0 21950.0 21955.0 ... 7 5 11 4 15 21940.0 1.644120e+10 0 149331 96838
4 b'ZN2106x0012750x002' 1619744403 883381 21945.0 21940.0 21935.0 21930.0 21925.0 21955.0 21960.0 ... 3 7 6 16 59 21950.0 1.644647e+10 0 149379 96846
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ... ...
20343 b'ZN2106x0067000x009' 1619765999 791039 21795.0 21790.0 21785.0 21780.0 21775.0 21800.0 21805.0 ... 95 12 2 11 14 21795.0 2.768403e+10 0 252355 85339
20344 b'ZN2106x0061000x00x000' 1619766000 302063 21795.0 21790.0 21785.0 21780.0 21775.0 21800.0 21805.0 ... 93 13 2 11 14 21800.0 2.768424e+10 0 252357 85339
20345 b'ZN2106x0013750x0010' 1619766000 781186 21795.0 21790.0 21785.0 21780.0 21775.0 21800.0 21805.0 ... 93 13 2 11 14 21795.0 2.768435e+10 0 252358 85338
20346 b'ZN2106x0019000x009' 1619766001 317317 21795.0 21790.0 21785.0 21780.0 21775.0 21800.0 21805.0 ... 92 13 2 11 14 21795.0 2.768490e+10 0 252363 85338
20347 b'ZN2106x0019000' 1619766002 518211 21795.0 21790.0 21785.0 21780.0 21775.0 21800.0 21805.0 ... 92 13 2 11 14 21795.0 2.768490e+10 0 252363 85338
[20348 rows x 28 columns]
列tk是字节对象，我想把它做成字符串。
我试过：
df['tk'].str.decode('uft-8')
但我得到了：
In [17]: a['tk'].str.decode('utf-8')
Out[17]:
0 ZN2106
1 ZN21061025009
2 ZN2106167509
3 ZN21061475009
4 ZN2106127502
...
20343 ZN2106670009
20344 ZN2106610000
20345 ZN21061375010
20346 ZN2106190009
20347 ZN210619000
Name: tk, Length: 20348, dtype: object
这不是我想要的，正如你所看到的，第二排，
我想要的是ZN2106，但它还给了我'ZN21061025009'
它忽略了以"\x0"结尾的字符串，我该如何解决这个问题？
尝试apply:
import pandas as pd
a = pd.DataFrame([b'ZN2106',b'ZN2106x0010250x0009'],columns=['tk'])
print(a)
print()
print(a['tk'].apply(lambda x: x.decode('utf8').split('x00')[0]))
输出：
tk
0 b'ZN2106'
1 b'ZN2106x0010250x0009'
0 ZN2106
1 ZN2106
Name: tk, dtype: object