CODEWITHSUNDEEP
pythonformatflaskjinja2
cnDenis
cnDenis

Reputation: 131

How to set the default float format for Jinja in Flask?

I am using Jinja in Flask, I want to make all float looks like 123.45 by default in all my html page, not to keep too many digits after decimal point. I don't want to format every float one by one in the template file. How can I do it ?

Upvotes: 1

Views: 1751

Answers (2)

Hiroaki Genpati
Hiroaki Genpati

Reputation: 79

you can using context processor for create custome filter for this.

i have copy from flask official documentation for doing this problem.

@app.context_processor
def utility_processor():
    def format_price(amount):
        return u'{0:.2f}{1}'.format(amount)
    return dict(format_price=format_price)

You can pass all value using this filter with

{{ format_price(0.33) }}

hopefully answer.

Upvotes: 1

SeanPlusPlus
SeanPlusPlus

Reputation: 9033

you could also look into using the decimal module:

http://docs.python.org/2/library/decimal.html

here's a quick example taken from the above docs:

>>> from decimal import *
>>> getcontext().prec = 2
>>> rounded_num = Decimal(1) / Decimal(7)
>>> rounded_num
Decimal('0.14')

by using this module all of the floats in your application will be nicely cast to two digits after the decimal.

Upvotes: 0

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