mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-27 13:14:41 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

Unparse infinite imaginary literals correctly. Add some more numeric tests.

Browse source
This commit is contained in:
Mark Dickinson 2010-06-30 11:45:53 +00:00
parent abe52d749c
commit cba8c10b5c
2 changed files with 20 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Demo/parser/unparse.py
View file

@ -6,6 +6,10 @@ import tokenize
import io
import os
# Large float and imaginary literals get turned into infinities in the AST.
# We unparse those infinities to INFSTR.
INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1)
def interleave(inter, f, seq):
"""Call f on each item in seq, calling inter() in between.
"""
@ -311,11 +315,8 @@ class Unparser:
self.write(t.id)
def _Num(self, t):
if isinstance(t.n, float) and math.isinf(t.n):
# Subsitute overflowing decimal literal for AST infinity
self.write("1e" + repr(sys.float_info.max_10_exp + 1))
else:
self.write(repr(t.n))
# Substitute overflowing decimal literal for AST infinities.
self.write(repr(t.n).replace("inf", INFSTR))
def _List(self, t):
self.write("[")