amazon web services - Regex on picking S3 bucket name from S3 URI -


i have been trying regex pattern obtain s3 bucket name s3 uri have no luck.

example: s3://example-bucket/file-name.filetype

closest this: \/\/([^\/].*[^\/])\/ i'm not sure how negate slash result

the part ([^/]+) looking sequence of of characters not slash. keeping close had write //([^/]+)/ same 

//([^/]+)

optional use lookbehind (?<=//) and/or lookahead (?=/)

(?<=//)([^/]+)(?=/)

(depending on use cases couple of different lookahead expressions possible)

'lookaround' 'lookbehind' not supported in regexp dialects. e.g. not in javascript

debuggex demo


Comments

Post a Comment

Popular posts from this blog

4x4 Matrix in Python -

im trying code 4x4 matrix in python random integers 1-4. thats easy enough problem want each row , each column 1 time uses of each digit 1-4 example 1 2 3 4 2 3 4 1 3 4 1 2 4 1 2 3 my code 33% of time in loop there happens somthing this 2 1 4 3 3 4 2 1 1 3 x <-------- because of programm cant contiune , end in infinity loop helb how can out? code below """ programm playing game skyline """ random import randrange row1 = [] row2 = [] row3 = [] row4 = [] allrows = [row1, row2, row3, row4] column1 = [] column2 = [] column3 = [] column4 = [] allcolumns = [column1, column2, column3, column4] def board(): in range(4): j = 0 while len(allrows[i]) != 4: x = randrange(1,5) print(i, j) if x not in allrows[i] , x not in allcolumns[j]: allrows[i].append(x) allcolumns[j].append(x) j += 1 else: continue boa...
Read more

python - String indices must be integers and while issue -

i writing code school homework. assignment this: write code read book codes till "000" entered , split books 2 categories depending on first 4 digits entered isbn , issn. note : use str , check prefix of code (in case isbn , issn). here code: bookarray = [] booknumber = str(input("give me book code - type 000 if want cancel")) while booknumber != "000": bookarray.append(booknumber) booknumber = str(input("give me book code - type 000 if want cancel")) if booknumber[0,4] == "isbn": isbnarray = booknumber elif booknumber[0,4] == "issn": issnarray = booknumber print(issnarray) print(isbnarray) any regarding same appreciated! in first year in python @ school. edit: expected output should 2 lists books' code numbers. currently, face autonomous loop on "while" not sure of how , why. if booknumber[0,4] == "isbn": you're passing tuple index booknumber ex...
Read more

python - PyInstaller UAC not working in onefile mode -

hello everybody. i have small python project , want make single executable file . using... windows 7 python 3.4 pyinstaller 3.2.1 my pyinstaller command is, pyinstaller -y -w -f -n output_file_name --uac-admin --clean source_file.py this command works properly. single output file not ask admin rights when executed. , there's no shield mark on executable file icon. when remove -f option (equivalent --onefile), output executable file has shield mark on icon , ask me admin rights. not want. want single executable file. i found manifest file (output_file_name.exe.manifest) in dist\output_file_name folder. did... pyinstaller -y -w -f -n output_file_name --manifest output_file_name.exe.manifest --uac-admin --clean source_file.py but command doesn't work. single executable file still not ask admin rights. i have removed pyinstaller , installed recent development version. pip install git+https://github.com/pyinstaller/pyinstaller.git@develop but result...
Read more