返回被去除指定字符的字符串
默认去除空白字符
删除首尾字符:str.strip([char])
删除首字符:str.lstrip([char])
删除尾字符str.strip([char])
判断是否匹配首末字符
匹配成功返回True,否则返回False
匹配首字符:str.startswith(char[, start[, end]])
匹配末字符:str.endswith(char[, start[, end]])
查找字符,找到返回字符位置,否则返回-1
从字符串开头查找str.find(char[, start[, end]])
从字符串末端开始查找str.find(char[, start[, end]])
分解字符
str.split([sep [, maxsplit]])
连接字符
str.join(iterable)
“str”是连接字符,“iterable”是被连接的可迭代字符串
替换字符
str.replace(old, new [,count])
返回替换后的字符串,count标识替换的次数,默认所有的字符都被替换
按换行符分解字符串,返回行列表
str.splitlines([keepends])
结果不保留换行符,除非keepends为True。
大小写转换
大小写互换:str.swapace()
转换为大写:str.upper()
转换为小写:str.lower()

Python is an interpreted language, but it also includes the compilation process. 1) Python code is first compiled into bytecode. 2) Bytecode is interpreted and executed by Python virtual machine. 3) This hybrid mechanism makes Python both flexible and efficient, but not as fast as a fully compiled language.

Useaforloopwheniteratingoverasequenceorforaspecificnumberoftimes;useawhileloopwhencontinuinguntilaconditionismet.Forloopsareidealforknownsequences,whilewhileloopssuitsituationswithundeterminediterations.

Pythonloopscanleadtoerrorslikeinfiniteloops,modifyinglistsduringiteration,off-by-oneerrors,zero-indexingissues,andnestedloopinefficiencies.Toavoidthese:1)Use'i

Forloopsareadvantageousforknowniterationsandsequences,offeringsimplicityandreadability;whileloopsareidealfordynamicconditionsandunknowniterations,providingcontrolovertermination.1)Forloopsareperfectforiteratingoverlists,tuples,orstrings,directlyacces

Pythonusesahybridmodelofcompilationandinterpretation:1)ThePythoninterpretercompilessourcecodeintoplatform-independentbytecode.2)ThePythonVirtualMachine(PVM)thenexecutesthisbytecode,balancingeaseofusewithperformance.

Pythonisbothinterpretedandcompiled.1)It'scompiledtobytecodeforportabilityacrossplatforms.2)Thebytecodeistheninterpreted,allowingfordynamictypingandrapiddevelopment,thoughitmaybeslowerthanfullycompiledlanguages.

Forloopsareidealwhenyouknowthenumberofiterationsinadvance,whilewhileloopsarebetterforsituationswhereyouneedtoloopuntilaconditionismet.Forloopsaremoreefficientandreadable,suitableforiteratingoversequences,whereaswhileloopsoffermorecontrolandareusefulf

Forloopsareusedwhenthenumberofiterationsisknowninadvance,whilewhileloopsareusedwhentheiterationsdependonacondition.1)Forloopsareidealforiteratingoversequenceslikelistsorarrays.2)Whileloopsaresuitableforscenarioswheretheloopcontinuesuntilaspecificcond


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