Python SolutionsPython Solutions
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Run-Length Encoding
Week 34, 2026
All SolutionsPython - Two Pointers | BMC | Python Solutions
def ReadFile(fileName:str) -> str:
mainTxt = ""
fileName += '.txt' if fileName[-4:] != ".txt" else ""
try:
file = open(fileName, 'r')
for line in file:
mainTxt = line.rstrip('\n')
file.close()
except FileNotFoundError as e:
print("File not found")
print(e)
finally:
return mainTxt
def WriteFile(someString: str) -> None:
# Writes a single line only
try:
file = open("ans.txt", 'w')
file.write(someString)
file.close()
except:
print("Error occured while wrirting file.")
finally:
print("WriteFile has ended.")
def toRLE(someString: str) -> str:
listRLE = []
startPtr = 0
checkPtr = 0
lenSS = len(someString)
while startPtr < lenSS:
if someString[startPtr] == someString[checkPtr]:
startPtr += 1
continue
listRLE.append(f"{startPtr-checkPtr}{someString[checkPtr]}")
checkPtr = startPtr
listRLE.append(f"{startPtr-checkPtr}{someString[checkPtr]}")
return "".join(listRLE)
def main() -> None:
x = toRLE(ReadFile("data.txt"))
WriteFile(x)
# blah blah
main()
