4 examples of 'python add commas to number' in Python

3
def add_commas_to_number(the_num):
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    """Add commas to thousandths places--or return an error message
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    https://stackoverflow.com/questions/5180365/python-add-comma-into-number-string
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    """
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    if not the_num:
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        return None, "You must specify a number"
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    #
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    if type(the_num) == int:
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        return '{:,}'.format(the_num), None
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    elif type(the_num) == float:
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        return '{:,.2f}'.format(the_num), None # Rounds to 2 decimal places
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    else:
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        err_msg = ('Please use an int or float.')
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        return None, err_msg

110
def insertCommas(value):
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    return '{:,}'.format(int(value))

11
def commas(N):
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    """
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    Format positive integer-like N for display with
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    commas between digits grouping: "XXX,YYY,ZZZ"
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    """
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    digits = str(N)
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    assert(digits.isdigit())
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    result = ''
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    while digits:
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        digits, last3 = digits[:-3], digits[-3:]
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        result = (last3 + ',' + result) if result else last3
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    return result

3
@app.template_filter()
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def format_commas(num):
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    '''Format an int with commas: 1,234,567'''
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    return "{:,d}".format(num)