## page was renamed from Python/FstringFromating
== Python Fstring formatting ==
 * f - string is the latest python string formatting addition, added in 3.5
   * an f-string is created by prefixing the string with a f  e.g. {{{
f"this is a f-string"
     }}}

== Examples of f-strings ==
 * numbers f'{value:{width}.{precision}f}'  {{{
 a= 10.1234

 >>> f'{a:.2f}'
 '10.12'


>>> f'{a*1000:,.2f}'
'10,123.40'

>>> f'{75.765367:.0f}'
'76'

>>> f"{a:>10}"
'    10.123'

>>> f"{a:<10.2f}"
'10.12     '

>>> f"{score:+.3f}"
'+10.123'
    }}}

 * date {{{
>>> f'test-{datetime.datetime.now():%Y-%m-%d_%H:%M:%S}.txt'
'test-2019-01-29_17:53:37.txt'

}}}
 * unix date time stamp ( seconds since 1970-01-01 ) {{{
f"{datetime.datetime.utcnow():%s}"
}}}

 * timestamp with timezone {{{
import datetime
tz = datetime.timezone.utc
ft = "%Y-%m-%dT%H:%M:%S%z"
t = datetime.datetime.now(tz=tz).strftime(ft)
print(f"== Summary {t} ==")

== Summary 2020-02-19T22:48:17+0000 ==
}}}

 * timestamp with specific timezone e.g. 'Pacific/Auckland' +12/+13 {{{
import datetime
import pytz  # External timezone data, updates often

tz = pytz.timezone('Pacific/Auckland')
ft = "%Y-%m-%dT%H:%M:%S%z"
t = datetime.datetime.now(tz=tz).strftime(ft)
print(f"== Summary {t} ==")

== Summary 2020-02-20T12:04:14+1300 ==
}}}