FilesExpand file tree

 main

/

float_parse.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

32 lines (25 loc) · 1.07 KB

 main

/

float_parse.py

Top

File metadata and controls

• Code
• Blame

32 lines (25 loc) · 1.07 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

# test parsing of floats

inf = float('inf')

# it shouldn't matter where the decimal point is if the exponent balances the value

print(float('1234') - float('0.1234e4'))

print(float('1.015625') - float('1015625e-6'))

# very large integer part with a very negative exponent should cancel out

print('%.4e' % float('9' * 60 + 'e-60'))

print('%.4e' % float('9' * 60 + 'e-40'))

# many fractional digits

print(float('.' + '9' * 70))

print(float('.' + '9' * 70 + 'e20'))

print(float('.' + '9' * 70 + 'e-50') == float('1e-50'))

# tiny fraction with large exponent

print(float('.' + '0' * 60 + '1e10') == float('1e-51'))

print(float('.' + '0' * 60 + '9e25') == float('9e-36'))

print(float('.' + '0' * 60 + '9e40') == float('9e-21'))

# ensure that accuracy is retained when value is close to a subnormal

print(float('1.00000000000000000000e-37'))

print(float('10.0000000000000000000e-38'))

print(float('100.000000000000000000e-39'))

# very large exponent literal

print(float('1e4294967301'))

print(float('1e-4294967301'))

print(float('1e18446744073709551621'))

print(float('1e-18446744073709551621'))