ciso8601 | Fast ISO8601 date time parser for Python written in C | Date Time Utils library

from datetime import datetime, timedelta
base, n = datetime(2000, 1, 1, 1, 2, 3, 420001), 1000
datelist = [(base + timedelta(days=i)).isoformat(' ') for i in range(n)]
# datelist
# ['2000-01-01 01:02:03.420001'
# ...
# '2002-09-26 01:02:03

FROM python:3.7-slim

WORKDIR /app

# both files are explicitly required!
COPY Pipfile Pipfile.lock ./

RUN pip install pipenv && \
  apt-get update && \
  apt-get install -y --no-install-recommends gcc python3-dev libssl-d

stack['timestamp'] = pd.to_datetime(stack['timestamp'])
stack['timestamp']= (stack.sort_values(['id','timestamp'])
                            .groupby('id')
                            .diff()['timestamp']
                            .dt.

import datetime
import ciso8601

t0 = datetime.datetime.now()
i = 0
with open('input.csv') as file:
    for line in file:
        strings = line.split(",")
        d = ciso8601.parse_datetime('%sT%s' % (strings[0], strings[1]))
        i+=

from ciso8601 import parse_datetime
...
ltime = parse_datetime(sline[time_col].strip())

       1    0.254    0.254  123.795  123.795 :1()
20000423    4.188    0.000    4.188    0.000 {ciso8601.parse_datetime}