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|
# -*- coding: iso-8859-1 -*-
# mode: run
# tag: warnings
cimport cython
cdef Py_UNICODE char_ASCII = u'A'
cdef Py_UNICODE char_KLINGON = u'\uF8D2'
u_A = char_ASCII
u_KLINGON = char_KLINGON
def compare_ASCII():
"""
>>> compare_ASCII()
True
False
False
"""
print(char_ASCII == u'A')
print(char_ASCII == u'B')
print(char_ASCII == u'\uF8D2')
def compare_klingon():
"""
>>> compare_klingon()
True
False
False
"""
print(char_KLINGON == u'\uF8D2')
print(char_KLINGON == u'A')
print(char_KLINGON == u'B')
from cpython.unicode cimport PyUnicode_FromOrdinal
import sys
u0 = u'\x00'
u1 = u'\x01'
umax = PyUnicode_FromOrdinal(sys.maxunicode)
def unicode_ordinal(Py_UNICODE i):
"""
>>> ord(unicode_ordinal(0)) == 0
True
>>> ord(unicode_ordinal(1)) == 1
True
>>> ord(unicode_ordinal(sys.maxunicode)) == sys.maxunicode
True
>>> ord(unicode_ordinal(u0)) == 0
True
>>> ord(unicode_ordinal(u1)) == 1
True
>>> ord(unicode_ordinal(umax)) == sys.maxunicode
True
Value too small:
>>> unicode_ordinal(-1) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
OverflowError: ...
Value too large:
>>> unicode_ordinal(sys.maxunicode+1) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
OverflowError: ...
Less than one character:
>>> unicode_ordinal(u0[:0])
Traceback (most recent call last):
...
ValueError: only single character unicode strings can be converted to Py_UNICODE, got length 0
More than one character:
>>> unicode_ordinal(u0+u1)
Traceback (most recent call last):
...
ValueError: only single character unicode strings can be converted to Py_UNICODE, got length 2
"""
return i
def ord_pyunicode(Py_UNICODE x):
"""
>>> ord_pyunicode(u0)
0
>>> ord_pyunicode(u_A)
65
>>> ord_pyunicode(u_KLINGON)
63698
"""
return ord(x)
@cython.test_assert_path_exists('//PythonCapiCallNode')
@cython.test_fail_if_path_exists('//SimpleCallNode')
def unicode_type_methods(Py_UNICODE uchar):
"""
>>> unicode_type_methods(ord('A'))
[True, True, False, False, False, False, False, True, True]
>>> unicode_type_methods(ord('a'))
[True, True, False, False, True, False, False, False, False]
>>> unicode_type_methods(ord('8'))
[True, False, True, True, False, True, False, False, False]
>>> unicode_type_methods(ord('\\t'))
[False, False, False, False, False, False, True, False, False]
"""
return [
# character types
uchar.isalnum(),
uchar.isalpha(),
uchar.isdecimal(),
uchar.isdigit(),
uchar.islower(),
uchar.isnumeric(),
uchar.isspace(),
uchar.istitle(),
uchar.isupper(),
]
@cython.test_assert_path_exists('//PythonCapiCallNode')
@cython.test_fail_if_path_exists('//SimpleCallNode')
def unicode_methods(Py_UNICODE uchar):
"""
>>> unicode_methods(ord('A')) == ['a', 'A', 'A']
True
>>> unicode_methods(ord('a')) == ['a', 'A', 'A']
True
"""
return [
# character conversion
uchar.lower(),
uchar.upper(),
uchar.title(),
]
@cython.test_assert_path_exists('//IntNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
'//PythonCapiCallNode')
def len_uchar(Py_UNICODE uchar):
"""
>>> len_uchar(ord('A'))
1
"""
assert uchar # just to avoid C compiler unused arg warning
return len(uchar)
def index_uchar(Py_UNICODE uchar, Py_ssize_t i):
"""
>>> index_uchar(ord('A'), 0) == ('A', 'A', 'A')
True
>>> index_uchar(ord('A'), -1) == ('A', 'A', 'A')
True
>>> index_uchar(ord('A'), 1)
Traceback (most recent call last):
IndexError: string index out of range
"""
return uchar[0], uchar[-1], uchar[i]
mixed_ustring = u'AbcDefGhIjKlmnoP'
lower_ustring = mixed_ustring.lower()
upper_ustring = mixed_ustring.lower()
@cython.test_assert_path_exists('//PythonCapiCallNode',
'//ForFromStatNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
'//ForInStatNode')
def count_lower_case_characters(unicode ustring):
"""
>>> count_lower_case_characters(mixed_ustring)
10
>>> count_lower_case_characters(lower_ustring)
16
"""
cdef Py_ssize_t count = 0
for uchar in ustring:
if uchar.islower():
count += 1
return count
@cython.test_assert_path_exists('//PythonCapiCallNode',
'//ForFromStatNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
'//ForInStatNode')
def count_lower_case_characters_slice(unicode ustring):
"""
>>> count_lower_case_characters_slice(mixed_ustring)
10
>>> count_lower_case_characters_slice(lower_ustring)
14
"""
cdef Py_ssize_t count = 0
for uchar in ustring[1:-1]:
if uchar.islower():
count += 1
return count
@cython.test_assert_path_exists('//SwitchStatNode',
'//ForFromStatNode')
@cython.test_fail_if_path_exists('//ForInStatNode')
def iter_and_in():
"""
>>> iter_and_in()
a
b
e
f
h
"""
for c in u'abcdefgh':
if c in u'abCDefGh':
print c
@cython.test_assert_path_exists('//SwitchStatNode')
@cython.test_fail_if_path_exists('//ForInStatNode')
def index_and_in():
"""
>>> index_and_in()
1
3
4
7
8
"""
cdef int i
for i in range(1,9):
if u'abcdefgh'[-i] in u'abCDefGh':
print i
def uchar_lookup_in_dict(obj, Py_UNICODE uchar):
"""
>>> d = {u_KLINGON: 1234, u0: 0, u1: 1, u_A: 2}
>>> uchar_lookup_in_dict(d, u_KLINGON)
(1234, 1234)
>>> uchar_lookup_in_dict(d, u_A)
(2, 2)
>>> uchar_lookup_in_dict(d, u0)
(0, 0)
>>> uchar_lookup_in_dict(d, u1)
(1, 1)
"""
cdef dict d = obj
dval = d[uchar]
objval = obj[uchar]
return dval, objval
_WARNINGS = """
250:16: Item lookup of unicode character codes now always converts to a Unicode string. Use an explicit C integer cast to get back the previous integer lookup behaviour.
"""
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