/Python/Convert all date columns using pd.datetime

Convert all date columns using pd.datetime

def lookup(s):
    """
    This is an extremely fast approach to datetime parsing.
    For large data, the same dates are often repeated. Rather than
    re-parse these, we store all unique dates, parse them, and
    use a lookup to convert all dates.
    """
    dates = {date:pd.to_datetime(date) for date in s.unique()}
    return s.apply(lambda v: dates[v])

to_datetime: 5799 ms
dateutil:    5162 ms
strptime:    1651 ms
manual:       242 ms
lookup:        32 ms

Source: stackoverflow.com

Similar codes

0 vote131 views1 answer
Pandas iat 0
Python
0 vote100 views1 answer
Jinja flask
Python
18 votes156 views5 answers
Python continue
Python
2 votes140 views2 answers
Multiline string in python
Python
0 vote134 views1 answer
Openign in browser python
Python
0 vote115 views1 answer
Win64pyinstaller
Python
0 vote129 views1 answer
Spacy print word in vocab
Python
1 vote91 views2 answers
Fibonacci python
Python
0 vote125 views1 answer
Mad libs generator python tutorial
Python
0 vote112 views1 answer
Join mulitple dataframe pandas index
Python