*Memo:
- My post explains format_map().
- My post explains Format Specification with format_map() (1).
- My post explains Format Specification with format_map() (2).
- My post explains Format Specification with format_map() (4).
- My post explains Format Specification with format_map() (5).
- My post explains f-strings.
- My post explains format().
- My post explains a string.
:[f][a][s][z][#][0][w][g][.p][t] can format a string with format_map() as shown below:
<Format a string with 'str' input by or not by 's'>:
v = {'k':'hello world'} print(v['k']) # hello world print('"{k:.20s}"'.format_map(v)) print('"{k:.20}"'.format_map(v)) print('"{k:.11s}"'.format_map(v)) print('"{k:.11}"'.format_map(v)) print('"{k:s}"'.format_map(v)) print('"{k:}"'.format_map(v)) print('"{k}"'.format_map(v)) # "hello world" print('"{k:.9s}"'.format_map(v)) print('"{k:.9}"'.format_map(v)) # "hello wor" print('"{k:.6s}"'.format_map(v)) print('"{k:.6}"'.format_map(v)) # "hello " print('"{k:.2s}"'.format_map(v)) print('"{k:.2}"'.format_map(v)) # "he" print('"{k:.1s}"'.format_map(v)) print('"{k:.1}"'.format_map(v)) # "h" print('"{k:.0s}"'.format_map(v)) print('"{k:.0}"'.format_map(v)) # "" v = {'k':'123456789'} print(v['k']) # 123456789 print('"{k:.15s}"'.format_map(v)) print('"{k:.15}"'.format_map(v)) print('"{k:.9s}"'.format_map(v)) print('"{k:.9}"'.format_map(v)) print('"{k:s}"'.format_map(v)) print('"{k:}"'.format_map(v)) print('"{k}"'.format_map(v)) # "123456789" print('"{k:.6s}"'.format_map(v)) print('"{k:.6}"'.format_map(v)) # "123456" print('"{k:.2s}"'.format_map(v)) print('"{k:.2}"'.format_map(v)) # "12" print('"{k:.1s}"'.format_map(v)) print('"{k:.1}"'.format_map(v)) # "1" print('"{k:.0s}"'.format_map(v)) print('"{k:.0}"'.format_map(v)) # "" <Format a string with 'int' input by or not by 'd'>:
v = {'k':123456789} print(v['k']) # 123456789 print('"{k:d}"'.format_map(v)) print('"{k:}"'.format_map(v)) print('"{k}"'.format_map(v)) # "123456789" print('"{k:,d}"'.format_map(v)) print('"{k:,}"'.format_map(v)) # "123,456,789" print('"{k:_d}"'.format_map(v)) print('"{k:_}"'.format_map(v)) # "123_456_789" <Format a string with 'float' input by 'f' or 'F'>:
v = {'k':1234.5555555555} # | 10 | print(v['k']) # 1234.5555555555 # | 10 | print('"{k:.20f}"'.format_map(v)) print('"{k:.20F}"'.format_map(v)) # "1234.55555555549995006004" # | 20 | print('"{k:.14f}"'.format_map(v)) print('"{k:.14F}"'.format_map(v)) # "1234.55555555549995" # | 14 | print('"{k:.13f}"'.format_map(v)) print('"{k:.13F}"'.format_map(v)) # "1234.5555555555000" # | 13 | print('"{k:.10f}"'.format_map(v)) print('"{k:.10F}"'.format_map(v)) # "1234.5555555555" # | 10 | print('"{k:.6f}"'.format_map(v)) print('"{k:.6F}"'.format_map(v)) print('"{k:f}"'.format_map(v)) print('"{k:F}"'.format_map(v)) # "1234.555556" # | 6 | print('"{k:.2f}"'.format_map(v)) print('"{k:.2F}"'.format_map(v)) # "1234.56" print('"{k:.1f}"'.format_map(v)) print('"{k:.1F}"'.format_map(v)) # "1234.6" print('"{k:.0f}"'.format_map(v)) print('"{k:.0F}"'.format_map(v)) # "1235" print('"{k:#.0f}"'.format_map(v)) print('"{k:#.0F}"'.format_map(v)) # "1235." print('"{k:,.20f}"'.format_map(v)) print('"{k:,.20F}"'.format_map(v)) # "1,234.55555555549995006004" # | 20 | print('"{k:,f}"'.format_map(v)) print('"{k:,F}"'.format_map(v)) # "1,234.555556" # | 6 | print('"{k:_.20f}"'.format_map(v)) print('"{k:_.20F}"'.format_map(v)) # "1_234.55555555549995006004" # | 20 | print('"{k:_f}"'.format_map(v)) print('"{k:_F}"'.format_map(v)) # "1_234.555556" # | 6 | print("{k1:f} {k2:f}".format_map({'k1':float('nan'), 'k2':float('inf')})) # nan inf print("{k1:F} {k2:F}".format_map({'k1':float('nan'), 'k2':float('inf')})) # NAN INF 
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