【问题标题】:How to merge two strings in python?如何在python中合并两个字符串?
【发布时间】:2015-10-14 23:10:18
【问题描述】:
我需要将字符串合并在一起以创建一个字符串。例如,需要组合的“hello”字符串是:
[H----]、[-E---]、[--LL-] 和 [----O]
这是我必须让字母首先出现的当前代码。
display_string = "[" + "".join([x if x == letter else "-" for x in word]) + "]"
我将如何制作字符串,例如
[H----]、[HE---]、[HELL-],最后是[HELLO]?
【问题讨论】:
标签:
python
string
concatenation
【解决方案1】:
我不知道这是否有助于您想要的方式,但这有效。问题是我们并没有真正的字符串替换。在最终组装之前,字符列表可能更适合您。
string_list = [
'H----',
'-E---',
'--LL-',
'----O'
]
word_len = len(string_list[0])
display_string = word_len*'-'
for word in string_list:
for i in range(word_len):
if word[i].isalpha():
display_string = display_string[:i] + word[i] + display_string[i+1:]
print '[' + display_string + ']'
【解决方案2】:
好的,所以我想我知道你打算用这个做什么了。
我们定义一个像“hello”这样的词,然后我们遍历“hello”中的所有唯一字母,我们得到你的display_strings。那么您的问题是如何将它们重新合并在一起?
word = "HELLO"
all_display_strings = ["[" + "".join([x if x == letter else "-" for x in word]) + "]" for letter in word]
# now merge the list of lists
length = len(all_display_strings[0])-2 # -2 for the opening and closing bracket
merged_display_strings = ['-']*length
for i in range(0, length):
for j in range(0, len(all_display_strings)):
if (all_display_strings[j][i+1] != '-'):
merged_display_strings[i] = all_display_strings[j][i+1]
print(''.join(merged_display_strings))
【解决方案3】:
假设您的字符串在列表中 all_strings
all_strings = ["[H----]", "[-E---]", "[--LL-]", "[----O]"]
# clean them
all_strings = map(lambda x:x.strip()[1:-1], all_strings)
# Let's create a list for the characters in the final string(for easy mutating)
final_string = ['' for _ in xrange(max(map(len, all_strings)))]
for single in all_strings:
for i, char in enumerate(single):
if char != '-': final_string[i]=char
print "[" + ''.join(final_string) + "]"
【解决方案4】:
strings = 'h----', '-e---', '--ll-', '----o'
letterSoups = [ [ (p, c) for (p, c) in enumerate(s) if c != '-' ]
for s in strings ]
result = list('-----')
for soup in letterSoups:
for p, c in soup:
result[p] = c
print ''.join(result)
【解决方案5】:
s = "[H----], [-E---], [--LL-], [----O]"
print(''.join(re.findall(r'\w', s)))
HELLO