将时间格式从2020年2月5日01:55 pm转换为2020-02-05 13:55:00

时间:2020-09-02 19:01:10

标签: python csv awk sed

转换此日期时间格式的最佳方法是什么?

Feb 05 2020   09:26 am
Feb 05 2020   01:55 pm

进入

2020-02-05 09:26:00
2020-02-05 13:55:00

我知道我可以使用sed在更改为2020-02-05格式的当天进行迭代。 我可以使用:

echo "01:55 pm" | sed -e 's/01:\([0-9]\+\) pm/13:\1:00/g'

遍历文件不同时间。

这是处理它的最佳方法吗? 我开始使用python或其他方法,如果它更干净的话。

4 个答案:

答案 0 :(得分:2)

使用内置函数将字符串解析为日期时间对象:

MaterialApp(
   home: homePage(),
  
   theme: homePage().getTheme(context),
   routes: routes,
)

将打印

from datetime import datetime

s = 'Feb 05 2020   09:26 am'
d = datetime.strptime(s, '%b %d %Y   %I:%M %p')
print(d)
print(type(d))

答案 1 :(得分:2)

您可以尝试按照显示的示例进行以下操作,编写和测试吗?

import cupy as cp

hori_avg = [0]*100
buffer_size = 10
width = 100 
a = cp.zeros((buffer_size, width))

new_frame = cp.ones(100)*3

a = a[1:, :]                        #delete first row
a = cp.stack((a,new_frame), axis=0) #append new row, but not working

说明: 添加上述解决方案的详细说明。

awk '
BEGIN{
  FS="[ :]"
  num=split("jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec",arr,",")
  for(i=1;i<=num;i++){
    month[arr[i]]=i
  }
}
{
  printf("%d-%02d-%02d %02d:%02d:00\n",$3,month[tolower($1)],$2,$(NF-2)+$NF=="pm" && $(NF-2)<12 ? 12 : 0 ),$(NF-1))
}'  Input_file

答案 2 :(得分:2)

您可以在awk ' ##Starting awk program from here. BEGIN{ ##Starting BEGIN section of this program from here. FS="[ :]" ##Setting field separator as space and colon here. num=split("jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec",arr,",") ##Creating array arr which has all months names in it. for(i=1;i<=num;i++){ ##Starting for loop from 1 to till value of arr length here. month[arr[i]]=i ##Creating month array with index of value of arr with index i and its value is variable i. } } { printf("%d-%02d-%02d %02d:%02d:00\n",$3,month[tolower($1)],$2,$(NF-2)+($NF=="pm" && $(NF-2)<12 ? 12 : 0 ),$(NF-1)) ##Printing 3rd field, month value with first field as index, 2nd field, 2nd last field and adding 12 if last field is pm else do not add anything. }' 中使用转换功能(请参见format codes):

datetime

礼物:

import datetime

in_format = '%b %d %Y   %I:%M %p'
out_format = '%Y-%m-%d %H:%M:%S'
value = 'Feb 05 2020   01:55 pm'

print(datetime.datetime.strptime(value, in_format).strftime(out_format))

答案 3 :(得分:0)

例如,您必须使用模块datetime和函数strptime。 您应该检查Python参考资料中的strptime

classmethod datetime.strptime(date_string, format)

返回与date_string相对应的日期时间,并根据格式进行解析。

from datetime import datetime
str1 = 'Feb 05 2020   09:26 am'
str2 = 'Feb 05 2020   01:55 pm'

date_1 = datetime.strptime(str1, "%b %d %Y    %I:%M %p")
date_2 = datetime.strptime(str2, "%b %d %Y    %I:%M %p")

print("date =", date_1)
print("date =", date_2)

结果:

date = 2020-02-05 09:26:00
date = 2020-02-05 13:55:00