[英]Going character by character in a string and swapping whitespaces with python
Okay so I have to switch ' ' to *s. 好的,所以我必须将''切换为* s。 I came up with the following
我想出了以下几点
def characterSwitch(ch,ca1,ca2,start = 0, end = len(ch)):
while start < end:
if ch[start] == ca1:
ch[end] == ca2
start = start + 1
sentence = "Ceci est une toute petite phrase."
print characterSwitch(sentence, ' ', '*')
print characterSwitch(sentence, ' ', '*', 8, 12)
print characterSwitch(sentence, ' ', '*', 12)
print characterSwitch(sentence, ' ', '*', end = 12)
Assigning len(ch) doesn't seem to work and also I'm pretty sure this isn't the most efficient way of doing this. 分配len(ch)似乎无效,而且我很确定这不是执行此操作的最有效方法。 The following is the output I'm aiming for:
以下是我的目标输出:
Ceci*est*une*toute*petite*phrase.
Ceci est*une*toute petite phrase.
Ceci est une*toute*petite*phrase.
Ceci*est*une*toute petite phrase.
Are you looking for replace()
? 您在寻找
replace()
吗?
sentence = "Ceci est une toute petite phrase."
sentence = sentence.replace(' ', '*')
print sentence
# Ceci*sest*sune*stoute*spetite*sphrase.
See a demo on ideone.com additionally. 另请参阅ideone.com上的演示 。
For your second requirement (to replace only from the 8th to the 12th character), you could do: 对于第二个要求(仅替换第8到第12个字符),您可以执行以下操作:
sentence = sentence[8:12].replace(' ', '*')
Assuming you have to do it character by character you could do it this way: 假设您必须逐个字符地执行此操作,则可以这样进行:
sentence = "this is a sentence."
replaced = ""
for c in sentence:
if c == " ":
replaced += "*"
else:
replaced += c
print replaced
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