adii1823
47 lines
914 B
Python
47 lines
914 B
Python
# context/decimal.prec.py
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from decimal import Context, Decimal, getcontext, setcontext
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one = Decimal("1")
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three = Decimal("3")
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orig_ctx = getcontext()
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ctx = Context(prec=5)
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setcontext(ctx)
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print(ctx)
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print(one / three)
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setcontext(orig_ctx)
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print(one / three)
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"""
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$ python context/decimal.prec.py
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Context(prec=5, rounding=ROUND_HALF_EVEN, Emin=-999999,
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Emax=999999, capitals=1, clamp=0, flags=[],
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traps=[InvalidOperation, DivisionByZero, Overflow])
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0.33333
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0.3333333333333333333333333333
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"""
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orig_ctx = getcontext()
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ctx = Context(prec=5)
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setcontext(ctx)
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try:
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print(ctx)
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print(one / three)
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finally:
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setcontext(orig_ctx)
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print(one / three)
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from decimal import localcontext
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with localcontext(Context(prec=5)) as ctx:
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print(ctx)
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print(one / three)
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print(one / three)
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with localcontext(Context(prec=5)), open("out.txt", "w") as out_f:
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out_f.write(f"{one} / {three} = {one / three}\n")
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