以前在windows下一直用的idel带的功能调试python程序,在linux下没调试过。(很多时候只是print)就从网上查找一下~
方法:
python -m pdb a.py
a.py是python文件。
(Pdb)模式下的常用命令:
q
退出debug
h 即help,打印所有可以命令
h w
打印命令 w 的含意
n
执行当前行直到到达下一行或直到它返回
s
执行当前行,一有可能就停止(比如当前行有一个函数调用)。它和n(next)的区别是当前行中有函数调用时s(step)会停止当前行的执行而去调用那个函数,而n不会停止,直到计算完成这一行(到达下一行)。
b(reak) [[filename:]lineno | function[, condition]]
设置断点,可以是行号或函数。如 b 10, b foo, b foo,n == 5,最后在函数foo()入口处设置一个断点,但仅当n的值是5时才有效。当b命令无参数时,打印所有断点。
tb(reak) [[filename:]lineno | function[, condition]]
临时断点,只hit一次。
disable [bpnumber [bpnumber ...]]
使指点行的断点(们)失效
enable [bpnumber [bpnumber ...]]
使指定行上的断点(们)有效
c
继续执行程序,直到遇到下一个断点
w
即where,打印当前执行点的位置
l [first, [,last]]
输出当前行附近的源码
p expression
执行一个表达式当打印其值。
a(rgs)
打印当前函数的参数及其值
重复执行上次的命令
并遇到pdb不认识的命令时,会将它当成python表达式执行。如果你想执行的表达时,最前面加上 ! 字符,比如 !n == 5
多个debug命令可以写在一行上,中间用两个分号分隔,如 s;;s。

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


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool
