字符串包含句子和数字，可以是浮点数或整数。我正在尝试为每个数字加1，然后用字符串中的新数字替换以前的数字。
我编写的代码仅对浮点数加1，而整数保持不变。
s = """helllo everyone 12 32 how 6.326 is a going?
well 7.498 5.8 today Im going 3 to talk 8748 234.0 about
python 3 and compare it with python 2"""
newstr = ''.join((ch if ch in '0123456789.' else ' ') for ch in s)
print(newstr)
listOfNumbers = [float(i) for i in newstr.split()]
#print(f'list of number= {listOfNumbers}')
new_str = s
for digit in listOfNumbers:
New_digit = digit+1
print (New_digit)
new_str = new_str.replace(str(digit),str(New_digit))
print(f'new_str = {new_str}')
使用split()字符串分割成项目。每个项目代表a string，afloat或a int。如果是string，则无法将其转换为数字并递增。如果float成功转换为，则可能仍然是int，因此我们尝试将“进一步”转换。
该代码仍然需要处理浮点舍入问题-请参见输出。
def increment_items(string):
'''Increment all numbers in a string by one.'''
items = string.split()
for idx, item in enumerate(items):
try:
repl = False
nf = float(item)
repl = nf + 1 # when we reach here, item is at least float ...
ni = int(item) # ... but might be int - so we try
repl = ni + 1 # when we reach here, item is not float, but int
items[idx] = str(repl)
except ValueError:
if repl != False:
items[idx] = str(repl) # when we reach here, item is float
return " ".join(items)
s = "helllo everyone 12 32 how 6.326 is a going?\
well 7.498 5.8 today Im going 3 to talk 8748 234.0 about\
python 3 and compare it with python 2"
print('Input:', '\n', s, '\n')
result = increment_items(s)
print('Output:', '\n', result, '\n')
输入：
helllo everyone 12 32 how 6.326 is a going? well 7.498 5.8 today Im going 3 to talk 8748 234.0 about python 3 and compare it with python 2
输出：
helllo everyone 13 33 how 7.326 is a going? well 8.498000000000001 6.8 today Im going 4 to talk 8749 235.0 about python 4 and compare it with python 3
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