用Python解析用户输入
我需要解析来自用户的输入,使其具有以下格式之一:用Python解析用户输入,python,parsing,input,numbers,range,Python,Parsing,Input,Numbers,Range,我需要解析来自用户的输入,使其具有以下格式之一: 1321 .. 123123 或 一个数字(可以是负数)、一个逗号、或两个点。,然后是另一个数字(可以是负数) 另外,第一个数字必须小于或等于正则表达式适用于我,请将它们直接应用于raw\u input()返回的值。例如: import re s1 = '1321 .. 123123' s2 = '-21323 , 1312321' s3 = '- 12312.. - 9' [int(x) for x in re.findall(r'[^,
1321 .. 123123
或
一个数字(可以是负数)、一个逗号、
或两个点。
,然后是另一个数字(可以是负数)
另外,第一个数字必须小于或等于
正则表达式适用于我,请将它们直接应用于raw\u input()
返回的值。例如:
import re
s1 = '1321 .. 123123'
s2 = '-21323 , 1312321'
s3 = '- 12312.. - 9'
[int(x) for x in re.findall(r'[^,.]+', ''.join(s1.split()))]
=> [1321, 123123]
[int(x) for x in re.findall(r'[^,.]+', ''.join(s2.split()))]
=> [-21323, 1312321]
[int(x) for x in re.findall(r'[^,.]+', ''.join(s3.split()))]
=> [-12312, -9]
首先使用。
进行拆分,然后使用,
我想这会有帮助。看看这个。大多数人会说使用正则表达式,但是如果数字总是整数,有更简单的方法。好的,如果-
和数字分开,例如-12312..-9
@chamini2我用处理那个案件的代码更新了我的答案
def ask_range():
raw = raw_input()
raw = raw.strip(' \t\n\r')
raw = map((lambda x: x.split("..")), raw.split(","))
raw = list(item for wrd in raw for item in wrd)
if len(raw) != 2:
print "\nexpecting a range value, try again."
return ask_range()
def ask_range():
raw = raw_input()
raw = raw.strip(' \t\n\r')
raw = re.split(r"\.\.|,", raw)
if len(raw) != 2:
print "\nexpecting a range value, try again."
return ask_range()
left = re.match(r'^\s*-?\s*\d+\s*$', raw[0])
right = re.match(r'^\s*-?\s*\d+\s*$', raw[1])
if not (left and right):
print "\nexpecting a range value, try again."
return ask_range()
left, right = int(left.group()), int(right.group())
if left > right:
print "\nexpecting a range value, try again."
return ask_range()
return left, right
import re
s1 = '1321 .. 123123'
s2 = '-21323 , 1312321'
s3 = '- 12312.. - 9'
[int(x) for x in re.findall(r'[^,.]+', ''.join(s1.split()))]
=> [1321, 123123]
[int(x) for x in re.findall(r'[^,.]+', ''.join(s2.split()))]
=> [-21323, 1312321]
[int(x) for x in re.findall(r'[^,.]+', ''.join(s3.split()))]
=> [-12312, -9]
def ask_range():
raw = raw_input()
lis = []
split1 = raw.split("..")
for i in split1:
try:
lis.append(int(i))
except:
for j in i.split(","):
list.append(int(j))
if len(raw) != 2:
print "\nexpecting a range value, try again."
return ask_range()
return lis