How do I format a date in Jinja2

Question

Using Jinja2  how do I format a date field  I know in Python I can simply do this   print car date of manufacture strftime   Y- m- d      But how do I format the date in Jinja2

User · Answer

If you are dealing with a lower level time object (I often just use integers), and don't want to write a custom filter for whatever reason, an approach I use is to pass the strftime function into the template as a variable, where it can be called where you need it.

For example:

import time
context={
    'now':int(time.time()),
    'strftime':time.strftime }  # Note there are no brackets () after strftime
                                # This means we are passing in a function, 
                                # not the result of a function.

self.response.write(jinja2.render_template('sometemplate.html', **context))

Which can then be used within sometemplate.html:

<html>
    <body>
        <p>The time is {{ strftime('%H:%M%:%S',now) }}, and 5 seconds ago it was {{ strftime('%H:%M%:%S',now-5) }}.
    </body>
</html>

User · Answer

I think you have to write your own filter for that  It s actually the example for custom filters in the documentation  http   jinja pocoo org docs api  custom-filters

User · Answer

Made it  from datetime import datetime dateNow   datetime now   strftime   Y m d

User · Answer

There are two ways to do it  The direct approach would be to simply call  and print  the strftime   method in your template  for example     car date of manufacture strftime   Y- m- d        Another  sightly better approach would be to define your own filter  e g    from flask import Flask import babel  app   Flask   name      app template filter   def format datetime value  format  medium        if format     full           format  EEEE  d  MMMM y  at  HH mm      elif format     medium           format  EE dd MM y HH mm      return babel dates format datetime value  format     This filter is based on babel for reasons regarding i18n  but you can use strftime too   The advantage of the filter is  that you can write     car date of manufacture datetime       car date of manufacture datetime  full        which looks nicer and is more maintainable  Another common filter is also the  timedelta  filter  which evaluates to something like  written 8 minutes ago   You can use babel dates format timedelta for that  and register it as filter similar to the datetime example given here

User · Answer

You can use it like this in template without any filters     car date of manufacture strftime   Y- m- d

User · Answer

Google App Engine users   If you re moving from Django to Jinja2  and looking to replace the date filter  note that the   formatting codes are different   The strftime   codes are here  http   docs python org 2 library datetime html strftime-and-strptime-behavior

User · Answer

There is a jinja2 extension you can use just need pip install  https   github com hackebrot jinja2-time

User · Answer

You can use it like this in jinja template    row session start date time strftime   d- m- Y  H  M  S     In this code the field name is row session start date time

User · Answer

in flask  with babel  I like to do this     app template filter  dt   def  jinja2 filter datetime date  fmt None       if fmt          return date strftime fmt      else          return date strftime gettext    m   d   Y      used in the template with   mydatetimeobject dt    so no with babel you can specify your various format in messages po like this for instance       app views py 36    python-format msgid    m   d   Y  msgstr    d   m   Y

User · Answer

Here s the filter that I ended up using for strftime in Jinja2 and Flask   app template filter  strftime   def  jinja2 filter datetime date  fmt None       date   dateutil parser parse date      native   date replace tzinfo None      format   b  d   Y      return native strftime format     And then you use the filter like so     car date of manufacture strftime

[python] How do I format a date in Jinja2?

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