micropython/tests/float/float_format.py

# test float formatting

# general rounding
for val in (116, 1111, 1234, 5010, 11111):
    print("%.0f" % val)
    print("%.1f" % val)
    print("%.3f" % val)

# make sure rounding is done at the correct precision
for prec in range(8):
    print(("%%.%df" % prec) % 6e-5)

# check certain cases that had a digit value of 10 render as a ":" character
print("%.2e" % float("9" * 51 + "e-39"))
print("%.2e" % float("9" * 40 + "e-21"))

# check a case that would render negative digit values, eg ")" characters
# the string is converted back to a float to check for no illegal characters
float("%.23e" % 1e-80)
py/formatfloat: Fix rounding of %f format with edge-case FP values. Prior to this patch the %f formatting of some FP values could be off by up to 1, eg '%.0f' % 123 would return "122" (unix x64). Depending on the FP precision (single vs double) certain numbers would format correctly, but others wolud not. This patch should fix all cases of rounding for %f. 7 years ago			`# test float formatting`

			`# general rounding`
			`for val in (116, 1111, 1234, 5010, 11111):`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 5 years ago			`print("%.0f" % val)`
			`print("%.1f" % val)`
			`print("%.3f" % val)`
py/formatfloat: Fix rounding of %f format with edge-case FP values. Prior to this patch the %f formatting of some FP values could be off by up to 1, eg '%.0f' % 123 would return "122" (unix x64). Depending on the FP precision (single vs double) certain numbers would format correctly, but others wolud not. This patch should fix all cases of rounding for %f. 7 years ago
			`# make sure rounding is done at the correct precision`
			`for prec in range(8):`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 5 years ago			`print(("%%.%df" % prec) % 6e-5)`
py/formatfloat: Fix case where floats could render with a ":" character. Prior to this patch, some architectures (eg unix x86) could render floats with a ":" character in them, eg 1e+39 would come out as ":e+38" (":" is just after "9" in ASCII so this is like 10e+38). This patch fixes some of these cases. 7 years ago
			`# check certain cases that had a digit value of 10 render as a ":" character`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 5 years ago			`print("%.2e" % float("9" * 51 + "e-39"))`
			`print("%.2e" % float("9" * 40 + "e-21"))`
py/formatfloat: Fix case where floats could render with negative digits. Prior to this patch, some architectures (eg unix x86) could render floats with "negative" digits, like ")". For example, '%.23e' % 1e-80 would come out as "1.0000000000000000/)/(,*0e-80". This patch fixes the known cases. 7 years ago
			`# check a case that would render negative digit values, eg ")" characters`
			`# the string is converted back to a float to check for no illegal characters`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 5 years ago			`float("%.23e" % 1e-80)`