熊猫：用缺少的分隔符分隔两列

问题描述

我有类似的数据：

00052600150.00942615
00052601000.01014910
00052601050.02709672
00052601100.11454732
00052601150.23151254
00052601200.36262522
00052601250.66432348
00052601301.07723763
00052601351.26019487
00052601401.20568581

前10位数字代表时间步YYMMDDhhmm，后跟数字

应该是0005260010,0.00799872，其中第一个块是一个时间步，第二个块是一个度量。

我曾经尝试过使用熊猫读取数据并将其转换为str，但随后我丢失了前导零？有没有一种方法可以用数字分隔浮点数？

问候

解决方法

带有大熊猫的正则表达式可以分隔列而无需分度符

# sample data
df = pd.DataFrame({'A': [
    '00052600150.00942615','00052601000.01014910','00052601050.02709672','00052601100.11454732','00052601150.23151254','00052601200.36262522','00052601250.66432348','00052601301.07723763','00052601351.26019487','00052601401.20568581',]})

df3 = df['A'].str.extract(
    r'(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})(\d\.\d*)',expand=True)
df3.columns = ['Year','Month','Day','Hour','Minute','Reading']
print(df3)

输出

  Year Month Day Hour Minute     Reading
0   00    05  26   00     15  0.00942615
1   00    05  26   01     00  0.01014910
2   00    05  26   01     05  0.02709672
3   00    05  26   01     10  0.11454732
4   00    05  26   01     15  0.23151254
5   00    05  26   01     20  0.36262522
6   00    05  26   01     25  0.66432348
7   00    05  26   01     30  1.07723763
8   00    05  26   01     35  1.26019487
9   00    05  26   01     40  1.20568581

,

您可以将列读为3，然后按位置划分值

str

出局：

df = pd.read_csv('yourfile.csv',header=None,dtype='str',names=['col1'])
df['time'] = pd.to_datetime(df.col1.str[:10],unit='s')
df['value'] = (df.col1.str[10:]).astype('float')
df