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string-format.py NaN GiB
# Change the following to True to get a much more comprehensive set of tests
# to run, albeit, which take considerably longer.
full_tests = False
def test(fmt, *args):
print('{:8s}'.format(fmt) + '>' + fmt.format(*args) + '<')
test("{}-{}", 1, [4, 5])
test("{0}-{1}", 1, [4, 5])
test("{1}-{0}", 1, [4, 5])
test("{:x}", 1)
test("{!r}", 2)
test("{:x}", 0x10)
test("{!r}", "foo")
test("{!s}", "foo")
test("{0!r:>10s} {0!s:>10s}", "foo")
test("{:4b}", 10)
test("{:4c}", 48)
test("{:4d}", 123)
test("{:4n}", 123)
test("{:4o}", 123)
test("{:4x}", 123)
test("{:4X}", 123)
test("{:#4b}", 10)
test("{:#4o}", 123)
test("{:#4x}", 123)
test("{:#4X}", 123)
test("{:<6s}", "ab")
test("{:>6s}", "ab")
test("{:^6s}", "ab")
test("{: <6d}", 123)
test("{: <6d}", -123)
test("{:0<6d}", 123)
test("{:0<6d}", -123)
test("{:@<6d}", 123)
test("{:@<6d}", -123)
test("{:@< 6d}", 123)
test("{:@< 6d}", -123)
test("{:@<+6d}", 123)
test("{:@<+6d}", -123)
test("{:@<-6d}", 123)
test("{:@<-6d}", -123)
test("{:@>6d}", -123)
test("{:@<6d}", -123)
test("{:@=6d}", -123)
test("{:06d}", -123)
test("{:10.4e}", 123.456)
test("{:10.4e}", -123.456)
test("{:10.4f}", 123.456)
test("{:10.4f}", -123.456)
test("{:10.4g}", 123.456)
test("{:10.4g}", -123.456)
test("{:10.4E}", 123.456)
test("{:10.4E}", -123.456)
test("{:10.4F}", 123.456)
test("{:10.4F}", -123.456)
test("{:10.4G}", 123.456)
test("{:10.4G}", -123.456)
# The following fails right now
#test("{:10.1}", 0.0)
def test_fmt(conv, fill, alignment, sign, prefix, width, precision, type, arg):
fmt = '{'
if conv:
fmt += '!'
fmt += conv
fmt += ':'
if alignment:
fmt += fill
fmt += alignment
fmt += sign
fmt += prefix
fmt += width
if precision:
fmt += '.'
fmt += precision
fmt += type
fmt += '}'
test(fmt, arg)
if fill == '0' and alignment == '=':
fmt = '{:'
fmt += sign
fmt += prefix
fmt += width
if precision:
fmt += '.'
fmt += precision
fmt += type
fmt += '}'
test(fmt, arg)
int_nums = (-1234, -123, -12, -1, 0, 1, 12, 123, 1234, True, False)
int_nums2 = (-12, -1, 0, 1, 12, True, False)
if full_tests:
for type in ('', 'b', 'd', 'o', 'x', 'X'):
for width in ('', '1', '3', '5', '7'):
for alignment in ('', '<', '>', '=', '^'):
for fill in ('', ' ', '0', '@'):
for sign in ('', '+', '-', ' '):
for prefix in ('', '#'):
for num in int_nums:
test_fmt('', fill, alignment, sign, prefix, width, '', type, num)
if full_tests:
for width in ('', '1', '2'):
for alignment in ('', '<', '>', '^'):
for fill in ('', ' ', '0', '@'):
test_fmt('', fill, alignment, '', '', width, '', 'c', 48)
if full_tests:
for conv in ('', 'r', 's'):
for width in ('', '1', '4', '10'):
for alignment in ('', '<', '>', '^'):
for fill in ('', ' ', '0', '@'):
for str in ('', 'a', 'bcd', 'This is a test with a longer string'):
test_fmt(conv, fill, alignment, '', '', width, '', 's', str)
eg_nums = (0.0, -0.0, 0.1, 1.234, 12.3459, 1.23456789, 123456789.0, -0.0,
-0.1, -1.234, -12.3459, 1e4, 1e-4, 1e5, 1e-5, 1e6, 1e-6, 1e10,
1e37, -1e37, 1e-37, -1e-37,
1.23456e8, 1.23456e7, 1.23456e6, 1.23456e5, 1.23456e4, 1.23456e3, 1.23456e2, 1.23456e1, 1.23456e0,
1.23456e-1, 1.23456e-2, 1.23456e-3, 1.23456e-4, 1.23456e-5, 1.23456e-6, 1.23456e-7, 1.23456e-8,
-1.23456e8, -1.23456e7, -1.23456e6, -1.23456e5, -1.23456e4, -1.23456e3, -1.23456e2, -1.23456e1, -1.23456e0,
-1.23456e-1, -1.23456e-2, -1.23456e-3, -1.23456e-4, -1.23456e-5, -1.23456e-6, -1.23456e-7, -1.23456e-8)
if full_tests:
for type in ('e', 'E', 'g', 'G', 'n'):
for width in ('', '4', '6', '8', '10'):
for alignment in ('', '<', '>', '=', '^'):
for fill in ('', '@', '0', ' '):
for sign in ('', '+', '-', ' '):
for prec in ('', '1', '3', '6'):
for num in eg_nums:
test_fmt('', fill, alignment, sign, '', width, prec, type, num)
# Note: We use 1.23459 rather than 1.2345 because '{:3f}'.format(1.2345)
# rounds differently than print("%.3f", 1.2345);
f_nums = (0.0, -0.0, 0.0001, 0.001, 0.01, 0.1, 1.0, 10.0,
0.0012, 0.0123, 0.1234, 1.23459, 12.3456,
-0.0001, -0.001, -0.01, -0.1, -1.0, -10.0,
-0.0012, -0.0123, -0.1234, -1.23459, -12.3456)
if full_tests:
for type in ('f', 'F'):
for width in ('', '4', '6', '8', '10'):
for alignment in ('', '<', '>', '=', '^'):
for fill in ('', ' ', '0', '@'):
for sign in ('', '+', '-', ' '):
# An empty precision defaults to 6, but when uPy is
# configured to use a float, we can only use a
# precision of 6 with numbers less than 10 and still
# get results that compare to CPython (which uses
# long doubles).
for prec in ('1', '2', '3'):
for num in f_nums:
test_fmt('', fill, alignment, sign, '', width, prec, type, num)
for num in int_nums2:
test_fmt('', fill, alignment, sign, '', width, '', type, num)
pct_nums1 = (0.1, 0.58, 0.99, -0.1, -0.58, -0.99)
pct_nums2 = (True, False, 1, 0, -1)
if full_tests:
type = '%'
for width in ('', '4', '6', '8', '10'):
for alignment in ('', '<', '>', '=', '^'):
for fill in ('', ' ', '0', '@'):
for sign in ('', '+', '-', ' '):
# An empty precision defaults to 6, but when uPy is
# configured to use a float, we can only use a
# precision of 6 with numbers less than 10 and still
# get results that compare to CPython (which uses
# long doubles).
for prec in ('1', '2', '3'):
for num in pct_nums1:
test_fmt('', fill, alignment, sign, '', width, prec, type, num)
for num in pct_nums2:
test_fmt('', fill, alignment, sign, '', width, '', type, num)
# We don't currently test a type of '' with floats (see the detailed comment
# in objstr.c)
# TODO Add tests for erroneous format strings.