Basic Formatting

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# define variables
x = 3.1415926
y = 1


    

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# 2 decimal places 
print "{:.2f}".format(x)


    

    




3.14

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# 2 decimal palces with sign
print "{:+.2f}".format(x)


    

    




+3.14

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# 2 decimal palces with sign
print "{:.2f}".format(-y)


    

    




-1.00

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# print with no decimal palces
print "{:.0f}".format(3.51)


    

    




4

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# left padded with 0's - width 4
print "{:0>4d}".format(11)


    

    




0011

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# print consecutive zero-padded numbers
for i in range(20):
    print "{:0>4d}".format(i)


    

    




0000
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
0014
0015
0016
0017
0018
0019

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# right padd with x's - total width 4
print "{:x<4d}".format(33)


    

    




33xx

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# right padd with x's - total width 4
print y
print "{:x<4d}".format(10*y)


    

    




1
10xx

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# insert a comma separator
print "{:,}".format(10000000000000)


    

    




10,000,000,000,000

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# % format
print "{:.4%}".format(0.1235676)


    

    




12.3568%

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# exponent notation
print "{:.3e}".format(10000000000000)


    

    




1.000e+13

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#  right justified, with 10
print '1234567890' # for place holders
print "{:10d}".format(10000000)


    

    




1234567890
  10000000

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#  left justified, with 10
print '0----5----0----5----0' # place holder
print "{:<10d}".format(100), "{:<10d}".format(100)


    

    




0----5----0----5----0
100        100       

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#  center justified, width 10
print '1234567890'
print "{:^10d}".format(100)


    

    




1234567890
   100    

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# string substitution
s1 = 'so much depends upon {}'.format('a red wheel barrow')
s2 = 'glazed with {} water beside the {} chickens'.format('rain', 'white')
print s1
print s2


    

    




so much depends upon a red wheel barrow
glazed with rain water beside the white chickens

In [10]:

    

# another substitution
s1 = " {0} is better than {1} ".format("emacs", "vim")
s2 = " {1} is better than {0} ".format("emacs", "vim")
print s1
print s2


    

    




 emacs is better than vim 
 vim is better than emacs 

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## defining formats
email_f = "Your email address was {email}".format
print email_f
## use elsewhere
var1 = "bob@example.com"
var2 = 'a@cox.net'
var3 = 'b@cox.net'
print(email_f(email=var1))
print(email_f(email=var2))
print(email_f(email=var3))


    

    




<built-in method format of str object at 0x7fd474115198>
Your email address was bob@example.com
Your email address was a@cox.net
Your email address was b@cox.net

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