symbol_list = ["....firstline.\\.||hi",
"pythonisasnake..\....",
"||||last.\\|line\\..."]
normal_list = ["ABCDfirstlineEFGHIJhi",
"pythonisasnakeKLMNOPQ",
"RSTUlastVWXYlineZABCD"]
在symbol_list
中,我想用normal_list
中相应位置的字母替换符号,并用*
替换列表中的非符号>
.
\
|
new_list = ["ABCD*********EFGHIJ**",
"**************KLMNOPQ",
"RSTU****VWXY****ZABCD"]
解决方案是什么?
对于这两个列表,我都需要以某种方式访问似乎非常复杂的每一行中的每个项目。我试图从for循环开始:
for symbol_row in symbol_list:
for symbol_item in symbol_row:
for normal_row in normal_list:
for normal_item in normal_row:
这令人困惑,似乎建议最多执行两次
然后我尝试检查其中一种情况:
if symbol_item in (".","\\","|"): # because \ is an escape character
symbol_row = symbol_row.replace(symbol_item, normal_item)
然后我将这一新行附加到new_list
,但列表的打印时间是打印出来后的10倍。
new_list.append(symbol_row)
答案 0 :(得分:5)
可以通过行理解和三元比较来完成:
symbol_list = ["....firstline.\\.||hi",
"pythonisasnake..\....",
"||||last.\\|line\\..."]
normal_list = ["ABCDfirstlineEFGHIJhi",
"pythonisasnakeKLMNOPQ",
"RSTUlastVWXYlineZABCD"]
print([''.join([n if not s.isalpha() else '*' for n,s in zip(nor, sym)])
for nor, sym in zip(normal_list, symbol_list)])
答案 1 :(得分:1)
此代码应满足您的需求。
symbol_list = ["....firstline.\\.||hi",
"pythonisasnake..\....",
"||||last.\\|line\\..."]
normal_list = ["ABCDfirstlineEFGHIJhi",
"pythonisasnakeKLMNOPQ",
"RSTUlastVWXYlineZABCD"]
letters = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
new_list = []
for i in range(len(symbol_list)):
new_list.append("")
for index in range(len(symbol_list[i])):
if letters.find(symbol_list[i][index]) != -1:
new_list[i] += "*"
else:
new_list[i] += normal_list[i][index]
print(new_list)
input()
它在symbol_list中找到字母的所有实例,并在新列表中添加一个星号
答案 2 :(得分:0)
我们可以这样写:
my_symbols = {'\\', '|', '.'}
[
''.join(('*', cb)[ca in my_symbols] for ca, cb in zip(linea, lineb))
for linea, lineb in zip(symbol_list, normal_list)
]
在这里,我们首先定义一组符号(以使其易于扩展)。接下来,我们同时遍历symbol_list
和normal_list
的行。然后,对于每一行,我们在这两行上进行迭代,并使用ca
(symbol_list
行的字符)作为选择器来决定我们是否填写'*'
或{{1} }。
样本输入的输出为:
cb
在示例输入中,由于最后一行包含以下内容,因此最后一行有些“未对齐”:
>>> [
... ''.join(('*', cb)[ca in my_symbols] for ca, cb in zip(linea, lineb))
... for linea, lineb in zip(symbol_list, normal_list)
... ]
['ABCD*********EFGHI**', '**************KLMNOPQ', 'RSTU****VWX****eZAB']
所以您的最后一行包含:
||||last.\|line\...
RSTUlastVWXYlineZABCD
答案 3 :(得分:0)
我宁愿可读性胜于长度,
symbol_list = ["....firstline.\\.||hi",
"pythonisasnake..\....",
"||||last.\\|line\\..."]
normal_list = ["ABCDfirstlineEFGHIJhi",
"pythonisasnakeKLMNOPQ",
"RSTUlastVWXYlineZABCD"]
final_list = list()
for nor, sym in zip(normal_list, symbol_list):
temp_string = ""
for n, s in zip(nor, sym):
if s.isalpha():
temp_string += '*'
else:
temp_string += n
final_list.append(temp_string)
print(final_list)
# output,
['ABCD*********EFGHI**', '**************KLMNOPQ', 'RSTU****VWX****eZAB']