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string_format.py

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def test(fmt, *args):

print("{:8s}".format(fmt) + ">" + fmt.format(*args) + "<")

test("{:10.4}", 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)

test("{:10.4n}", 123.456)

test("{:e}", 100)

test("{:f}", 200)

test("{:g}", 300)

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("{:06e}", float("inf"))

test("{:06e}", float("-inf"))

test("{:06e}", float("nan"))

test("{:f}", False)

test("{:f}", True)

# The following fails right now

# test("{:10.1}", 0.0)

print("%.0f" % (1.750000 % 0.08333333333))

# Below isn't compatible with single-precision float

# print("%.1f" % (1.750000 % 0.08333333333))

# print("%.2f" % (1.750000 % 0.08333333333))

# print("%.12f" % (1.750000 % 0.08333333333))

# tests for errors in format string

try:

"{:10.1b}".format(0.0)

except ValueError:

print("ValueError")