string formatting - How to force exponential number to be print with leading dot in python? -

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i trying print exponential number in python need number start dot. :

>>>print( "{:+???}".format(1.2345678) ) +.1234e+01

if multiply number 10 , format number scientific notation, have correct exponent coma misplaced. fortunately, know there 1 character sign , 1 digit before coma. can do

def format_exponential_with_leading_dot(n):     = "{:+e}".format(n * 10)     return a[0] + '.' + a[1] + a[3:]   >>> print format_exponential_with_leading_dot(1.2345678) +.1234568e+01

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