1  # SPDX-FileCopyrightText: 2020 Jeff Epler <https://unpythonic.net>
 2  #
 3  # SPDX-License-Identifier: Unlicense
 4  
 5  # pylint: disable=wrong-import-position,unused-import
 6  
 7  from jepler_udecimal import Decimal as D
 8  from jepler_udecimal import localcontext
 9  
10  d = D(".1")
11  e = D(".2")
12  f = D(".3")
13  g = D(".4")
14  # Prints 0 because all values involved are exact decimals
15  print(d + e + f + g - 1)
16  
17  import jepler_udecimal.utrig
18  
19  # Approximates pi to 78 decimal places
20  with localcontext() as ctx:
21      ctx.prec = 78
22      print(D("1").atan() * 4)