如何在Python中以不区分大小写的方式比较字符串?
我想使用简单的python代码将常规字符串的比较封装到存储库字符串中。我也想有能力在字典中查找值哈希字符串使用常规的python字符串。
当前回答
def insenStringCompare(s1, s2):
""" Method that takes two strings and returns True or False, based
on if they are equal, regardless of case."""
try:
return s1.lower() == s2.lower()
except AttributeError:
print "Please only pass strings into this method."
print "You passed a %s and %s" % (s1.__class__, s2.__class__)
其他回答
您可以使用casefold()方法。casefold()方法在比较时忽略案例。
firstString = "Hi EVERYONE"
secondString = "Hi everyone"
if firstString.casefold() == secondString.casefold():
print('The strings are equal.')
else:
print('The strings are not equal.')
输出:
The strings are equal.
def insenStringCompare(s1, s2):
""" Method that takes two strings and returns True or False, based
on if they are equal, regardless of case."""
try:
return s1.lower() == s2.lower()
except AttributeError:
print "Please only pass strings into this method."
print "You passed a %s and %s" % (s1.__class__, s2.__class__)
通常的方法是将字符串大写或小写，以便进行查找和比较。例如:
>>> "hello".upper() == "HELLO".upper()
True
>>>
先转换成小写字母怎么样?你可以使用string.lower()。
我找到了一个干净的解决方案，我正在使用一些固定的文件扩展名。
from pathlib import Path
class CaseInsitiveString(str):
def __eq__(self, __o: str) -> bool:
return self.casefold() == __o.casefold()
GZ = CaseInsitiveString(".gz")
ZIP = CaseInsitiveString(".zip")
TAR = CaseInsitiveString(".tar")
path = Path("/tmp/ALL_CAPS.TAR.GZ")
GZ in path.suffixes, ZIP in path.suffixes, TAR in path.suffixes, TAR == ".tAr"
# (True, False, True, True)
