Concatenate strings and variable values

Question

I would like to concatenate strings and variable values in Python 3. For instance, in R I can do the following:

today <- as.character(Sys.Date())
paste0("In ", substr(today,1,4), " this can be an R way")

Executing this code in R yields [1] "In the year 2018 R is so straightforward".

In Python 3.6 have tried things like:

today = datetime.datetime.now()
"In year " + today.year + " I should learn more Python"

today.year on its own yields 2018, but the whole concatenation yields the error: 'int' object is not callable

What's the best way to concatenate strings and variable values in Python3?

do you know how to use sprintf in R? the same can be accomplished in python by applying the % operator to a string. you can also .format a string. — MichaelChirico
– MichaelChirico, Commented Jan 14, 2018 at 19:55
Try "In year " + str(today.year) + " I should learn more Python". — nicola
– nicola, Commented Jan 14, 2018 at 19:55
The other commenters/answerers are giving you alternative approaches, but I think your code may have another issue. Rather than an error that says 'int' object is not callable', I would expect a TypeError saying cannot concatenate 'str' and 'int' objects. — Nicholas Flees
– Nicholas Flees, Commented Jan 14, 2018 at 19:59

Cássio Salvador · Accepted Answer · 2018-01-14 19:57:05Z

6

You could try to convert today.year into a string using str().

It would be something like that:

"In year " + str(today.year) + " I should learn more Python"

answered Jan 14, 2018 at 19:57

Cássio Salvador

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Comments

akrun · Accepted Answer · 2018-01-15 03:04:11Z

1

If we need to use . way then str() is equivalent to __str__()

>>> "In year " + today.year.__str__() + " I should learn more Python"
# 'In year 2018 I should learn more Python'

answered Jan 15, 2018 at 3:04

akrun

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