simplest python equivalent to R's grepl
Question:
Is there a simple/one-line python equivalent to R’s grepl function?
strings = c("aString", "yetAnotherString", "evenAnotherOne")
grepl(pattern = "String", x = strings) #[1] TRUE TRUE FALSE
Answers:
You can use list comprehension:
strings = ["aString", "yetAnotherString", "evenAnotherOne"]
["String" in i for i in strings]
#Out[76]: [True, True, False]
Or use re module:
import re
[bool(re.search("String", i)) for i in strings]
#Out[77]: [True, True, False]
Or with Pandas (R user may be interested in this library, using a dataframe “similar” structure):
import pandas as pd
pd.Series(strings).str.contains('String').tolist()
#Out[78]: [True, True, False]
A one-line equivalent is possible, using re:
import re
strings = ['aString', 'yetAnotherString', 'evenAnotherOne']
[re.search('String', x) for x in strings]
This won’t give you boolean values, but truthy results that are just as good.
If you do not need a regular expression, but are just testing for the existence of a susbtring in a string:
["String" in x for x in strings]
Is there a simple/one-line python equivalent to R’s grepl function?
strings = c("aString", "yetAnotherString", "evenAnotherOne")
grepl(pattern = "String", x = strings) #[1] TRUE TRUE FALSE
You can use list comprehension:
strings = ["aString", "yetAnotherString", "evenAnotherOne"]
["String" in i for i in strings]
#Out[76]: [True, True, False]
Or use re module:
import re
[bool(re.search("String", i)) for i in strings]
#Out[77]: [True, True, False]
Or with Pandas (R user may be interested in this library, using a dataframe “similar” structure):
import pandas as pd
pd.Series(strings).str.contains('String').tolist()
#Out[78]: [True, True, False]
A one-line equivalent is possible, using re:
import re
strings = ['aString', 'yetAnotherString', 'evenAnotherOne']
[re.search('String', x) for x in strings]
This won’t give you boolean values, but truthy results that are just as good.
If you do not need a regular expression, but are just testing for the existence of a susbtring in a string:
["String" in x for x in strings]