String in Python (19)

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This content originally appeared on DEV Community and was authored by Super Kai (Kazuya Ito)

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*Memos:

:[f][a][s][z][#][0][w][g][.p][t] can do alignment or other things for a string as shown below:

<Format a string with 's' for str>: 

v = 'hello world'

print(v)
# hello world

print('"{:.20s}"'.format(v))
print('"{:.11s}"'.format(v))
print('"{:.11}"'.format(v))
print('"{:s}"'.format(v))
print('"{:}"'.format(v))
print('"{}"'.format(v))
# "hello world"

print('"{:.9s}"'.format(v))
# "hello wor"

print('"{:.6s}"'.format(v))
# "hello "

print('"{:.2s}"'.format(v))
# "he"

print('"{:.1s}"'.format(v))
# "h"

print('"{:.0s}"'.format(v))
# ""

v = '123456789'

print(v)
# 123456789

print('"{:.15s}"'.format(v))
print('"{:.9s}"'.format(v))
print('"{:.9}"'.format(v))
print('"{:s}"'.format(v))
print('"{:}"'.format(v))
print('"{}"'.format(v))
# "123456789"

print('"{:.6s}"'.format(v))
# "123456"

print('"{:.2s}"'.format(v))
# "12"

print('"{:.1s}"'.format(v))
# "1"

print('"{:.0s}"'.format(v))
# ""

<Format a string with 'd' for int>: 

v = 123456789

print(v)
# 123456789

print('"{:d}"'.format(v))
print('"{:}"'.format(v))
print('"{}"'.format(v))
# "123456789"

print('"{:,d}"'.format(v))
print('"{:,}"'.format(v))
# "123,456,789"

print('"{:_d}"'.format(v))
print('"{:_}"'.format(v))
# "123_456_789"

<Format a string with 'f' for float>: 

v = 1234.5555555555
       # |   10   |
print(v)
# 1234.5555555555
#      |   10   |

print('"{:.20f}"'.format(v))
print('"{:.20F}"'.format(v))
# "1234.55555555549995006004"
#       |        20        |

print('"{:.14f}"'.format(v))
print('"{:.14F}"'.format(v))
# "1234.55555555549995"
#       |     14     |

print('"{:.13f}"'.format(v))
print('"{:.13F}"'.format(v))
# "1234.5555555555000"
#       |    13     |

print('"{:.10f}"'.format(v))
print('"{:.10F}"'.format(v))
print('"{:}"'.format(v))
print('"{}"'.format(v))
# "1234.5555555555"
#       |   10   |

print('"{:.6f}"'.format(v))
print('"{:.6F}"'.format(v))
print('"{:f}"'.format(v))
print('"{:F}"'.format(v))
# "1234.555556"
#       | 6  |

print('"{:.2f}"'.format(v))
print('"{:.2F}"'.format(v))
# "1234.56"

print('"{:.1f}"'.format(v))
print('"{:.1F}"'.format(v))
# "1234.6"

print('"{:.0f}"'.format(v))
print('"{:.0F}"'.format(v))
# "1235"

print('"{:#.0f}"'.format(v))
print('"{:#.0F}"'.format(v))
# "1235."

print('"{:,.20f}"'.format(v))
print('"{:,.20F}"'.format(v))
# "1,234.55555555549995006004"
#        |        20        |

print('"{:,.0f}"'.format(v))
print('"{:,.0F}"'.format(v))
# "1,235"

print('"{:_f}"'.format(v))
print('"{:_F}"'.format(v))
# "1_234.555556"
#        | 6  |

print('"{:_}"'.format(v))
# "1_234.5555555555"
#        |   10   |

print("{:f} {:f}".format(float('nan'), float('inf')))
# nan inf

print("{:F} {:F}".format(float('nan'), float('inf')))
# NAN INF


This content originally appeared on DEV Community and was authored by Super Kai (Kazuya Ito)


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