Common reasons for using python to format output

This article summarizes some simple and basic output formatting forms. I won’t say much below, let’s take a look at the detailed introduction.
1. Print string

>>> print "I'm %s" % ("jihite")
I'm jihite

2. Print integer

>>> print "I'm %d years old" % (17)
I'm 17 years old

3. Print Floating point number

>>> print "π=%f" % (3.1415926)
π=3.141593

4. Print floating point number (specify the number of decimal points to be retained)

>>> print "π=%.3f" % (3.1415926)
π=3.142

5. Specify the occupancy Placeholder width

>>> print "NAME:%8s AGE:%8d WEIGHT:%8.2f" % ("jihite", 17, 62.2)
NAME: jihite AGE:   17 WEIGHT:  62.20

6. Specify the placeholder width (left-aligned)

>>> print "NAME:%-8s AGE:%-8d WEIGHT:%-8.2f" % ("jihite", 17, 62.2)
NAME:jihite  AGE:17    WEIGHT:62.20

7. Specify the placeholder width placeholder (only 0 can be used as placeholder)

>>> print "NAME:%-8s AGE:%08d WEIGHT:%08.2f" % ("jihite", 17, 62.2)
NAME:jihite  AGE:00000017 WEIGHT:00062.20

8. Scientific notation

>>> format(0.0000023, '.2e')
'2.30e-06'
>>> format(0.23, '.2e')
'2.30e-01'

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