from datetime import datetimetimeStr=datetime.now().strftime('%Y-%m-%d %H%M%S')得到的是str类型的时间,应该就可以写进去了吧

import re>>> s = '2018-03-09 10:09:08'>>> re.search(r'\d+:\d+:\d+', s).group()'10:09:08'

用pandas库, import pandas as pd data = pd.read_csv('train.csv') train_data = data.values[0:TRAIN_NUM,1:] train_label = data.values[0:TRAIN_NUM,0] study.163.com/course/courseMain.htm?courseId=1000035 机器学习正好讲了这个手写识...

import pandas as pddf=pd.read(r'e:/aaaaa.csv')df.iloc[:,2:4].values.tolist()

python读取csv文件出来的是一个一个横向数据的列表list,你想要哪列的数据,只需要list[0],list[1],list[2]……这种取出来就OK了,希望能帮助到你!

pip install pyexcel 读取文件以后,在重新写入文件就可以了。 import pyexcel as pe import pyexcel.ext.xls # import it to handle xls file import pyexcel.ext.xlsx # import it to handle xlsx file records = pe.get_records(file_name="y...

可以把这个csv附上吗,我给你写个示例。

实测是可以从 a.csv复制到 b.csv中 import csv def foo(): with open('a.csv', 'r') as f: reader = csv.DictReader(f) rows = [row for row in reader] if not rows: return with open('b.csv', mode='w', newline='', errors='ignore') as f2:...

用pandas库, import pandas as pd data = pd.read_csv('train.csv') train_data = data.values[0:TRAIN_NUM,1:] train_label = data.values[0:TRAIN_NUM,0] study.163.com/course/courseMain.htm?courseId=1000035 机器学习正好讲了这个手写识...

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