python named group regex example
>>> re.search(r'(?P<name>[^-]+)-(?P<ver>d.d.d-d+).tar.gz', 'package_name-1.2.3-2004.tar.gz').groupdict()
{'name': 'package_name', 'ver': '1.2.3-2004'}python named group regex example
>>> re.search(r'(?P<name>[^-]+)-(?P<ver>d.d.d-d+).tar.gz', 'package_name-1.2.3-2004.tar.gz').groupdict()
{'name': 'package_name', 'ver': '1.2.3-2004'}re python3
import re
>>> m = re.search('(?<=abc)def', 'abcdef')
>>> m.group(0)
'def'python group by
df.groupby('group').assign(mean_var1 = lambda x: np.mean(x.var1)Copyright © 2021 Codeinu
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