I have a string such as '0111111011111100' and I want to separate every four characters so here that would be:
0111,1110,1100
Then I want to replace those with another values.
Here is my code so far, but it doesn't work properly:
4 Answers
You can use a list-comprehension with string indexing:
s = "0111111011111100"
[s[i:i+4] for i in range(0,len(s),4)]
gives:
['0111', '1110', '1111', '1100']
and then define a dictionary for what you want each nibble to translate to:
d = {'0111': 'a', '1110': 'b', '1111': 'c', '1100': 'd'}
and then you can shove the translating into the list-comp:
[d[s[i:i+4]] for i in range(0,len(s),4)]
which would give:
['a', 'b', 'c', 'd']
and finally use str.join to put this back into a string, making the entire conversion one-line:
''.join(d[s[i:i+4]] for i in range(0,len(s),4))
which gives:
'abcd'
as a matter of fact, a generator expression is being used here as they are more efficient than list-comprehensions
Comments
If you want to replace each group of four digits in string with some value you could use dict
line='0111111011111100'
lookup = {'0111': 'a', '1110': 'b', '1100': 'c'} # add all combination here
"".join(lookup.get(line[i:i+4], 'D') for i in range(0, len(line), 4)) # 'D' is default value
Out[18]: 'abDc'
Comments
Here's something that might help you:
str = "0111111011111100"
n = 4
# Create a list from you string with 4 characters in one element of list.
tmp_list = [str[i:i + n] for i in range(0, len(str), n)]
# tmp_list : ['0111', '1110', '1111', '1100']
for n, i in enumerate(tmp_list):
if tmp_list[n] == "0111":
tmp_list[n] = "A"
# elif ....
# Todo:
# Populate your if-elif requirements here.
result_str = ''.join(tmp_list)
Comments
line='0111111011111100'
# define a dictionary with nibbles as values
dict = { '0111': 'a', '1110': 'b', '1111': 'c', '1100': 'd'}
# define chunk size
n = 4
# use a list comprehension to split the original string into chunks
key_list = [line[i:i+n] for i in range(0, len(line), n)]
# use a generator expression to replace keys in the list with
# their dictionary values and join together
key_list = ' '.join(str(dict.get(value, value)) for value in key_list)
print(key_list)
2 Comments
mx0
While this code may answer the question, providing additional context regarding how and/or why it solves the problem would improve the answer's long-term value.
Steven_VdB
added some explanatory notes
linevariable to be modified so that in your case to becomeline = 'abcd'?