1ï¼å¿è®°å¨ if , elif , else , for , while , class ,def 声ææ«å°¾æ·»å ï¼ï¼å¯¼è´ âSyntaxError ï¼invalid syntaxâï¼
该é误å°åçå¨ç±»ä¼¼å¦ä¸ä»£ç ä¸ï¼if spam == 42
print('Hello!')2)ä½¿ç¨ = èä¸æ¯ ==ï¼å¯¼è´âSyntaxError: invalid syntaxâï¼
= æ¯èµå¼æä½ç¬¦è == æ¯çäºæ¯è¾æä½ã该é误åçå¨å¦ä¸ä»£ç ä¸ï¼if spam = 42:
print('Hello!')3ï¼é误ç使ç¨ç¼©è¿éãï¼å¯¼è´âIndentationErrorï¼unexpected indentâãâIndentationErrorï¼unindent does not match any outer indetation levelâ以åâIndentationErrorï¼expected an indented blockâï¼
è®°ä½ç¼©è¿å¢å åªç¨å¨ä»¥ï¼ç»æçè¯å¥ä¹åï¼èä¹åå¿
é¡»æ¢å¤å°ä¹åç缩è¿æ ¼å¼ã该é误åçå¨å¦ä¸ä»£ç ä¸ï¼print('Hello!')
print('Howdy!')æè
ï¼if spam == 42:
print('Hello!')
print('Howdy!')æè
ï¼if spam == 42:
print('Hello!')4ï¼å¨ for 循ç¯è¯å¥ä¸å¿è®°è°ç¨ len() (导è´âTypeError: 'list' object cannot be interpreted as an integerâ)
éå¸¸ä½ æ³è¦éè¿ç´¢å¼æ¥è¿ä»£ä¸ä¸ªlistæè
stringçå
ç´ ï¼è¿éè¦è°ç¨ range() å½æ°ãè¦è®°å¾è¿ålen å¼èä¸æ¯è¿åè¿ä¸ªå表ã
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼spam = ['cat', 'dog', 'mouse']
for i in range(spam):
print(spam[i])5ï¼å°è¯ä¿®æ¹stringçå¼ï¼å¯¼è´âTypeError: 'str' object does not support item assignmentâï¼
stringæ¯ä¸ç§ä¸å¯åçæ°æ®ç±»åï¼è¯¥é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = 'I have a pet cat.'
spam[13] = 'r'
print(spam)èä½ å®é
æ³è¦è¿æ ·åï¼
spam = 'I have a pet cat.'
spam = spam[:13] + 'r' + spam[14:]
print(spam)6ï¼å°è¯è¿æ¥éå符串å¼ä¸å符串ï¼å¯¼è´ âTypeError: Can't convert 'int' object to str implicitlyâï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
numEggs = 12
print('I have ' + numEggs + ' eggs.')èä½ å®é
æ³è¦è¿æ ·åï¼numEggs = 12
print('I have ' + str(numEggs) + ' eggs.')
æè
ï¼
numEggs = 12
print('I have %s eggs.' % (numEggs))7ï¼å¨å符串é¦å°¾å¿è®°å å¼å·ï¼å¯¼è´âSyntaxError: EOL while scanning string literalâï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
print(Hello!')
#æè
:
print('Hello!)
#æè
:
myName = 'Al'
print('My name is ' + myName + . How are you?')8ï¼åéæè
å½æ°åæ¼åé误ï¼å¯¼è´âNameError: name 'fooba' is not definedâï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
foobar = 'Al'
print('My name is ' + fooba)
#æè
:
spam = ruond(4.2)
#æè
:
spam = Round(4.2)9ï¼æ¹æ³åæ¼åé误ï¼å¯¼è´ âAttributeError: 'str' object has no attribute 'lowerr'âï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = 'THIS IS IN LOWERCASE.'
spam = spam.lowerr()10ï¼å¼ç¨è¶
è¿listæ大索å¼ï¼å¯¼è´âIndexError: list index out of rangeâï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = ['cat', 'dog', 'mouse']
print(spam[6])11ï¼ä½¿ç¨ä¸åå¨çåå
¸é®å¼ï¼å¯¼è´âKeyErrorï¼âspamââï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = {'cat': 'Zophie', 'dog': 'Basil', 'mouse': 'Whiskers'}
print('The name of my pet zebra is ' + spam['zebra'])12ï¼å°è¯ä½¿ç¨Pythonå
³é®åä½ä¸ºåéåï¼å¯¼è´âSyntaxErrorï¼invalid syntaxâï¼
Pythonå
³é®ä¸è½ç¨ä½åéåï¼è¯¥é误åçå¨å¦ä¸ä»£ç ä¸ï¼class = 'algebra'Python3çå
³é®åæï¼and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield
13ï¼å¨ä¸ä¸ªå®ä¹æ°åéä¸ä½¿ç¨å¢å¼æä½ç¬¦ï¼å¯¼è´âNameError: name 'foobar' is not definedâï¼
ä¸è¦å¨å£°æåéæ¶ä½¿ç¨0æè
空å符串ä½ä¸ºåå§å¼ï¼è¿æ ·ä½¿ç¨èªå¢æä½ç¬¦çä¸å¥spam += 1çäºspam = spam + 1ï¼è¿æå³çspaméè¦æå®ä¸ä¸ªææçåå§å¼ã
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = 0
spam += 42
eggs += 4214ï¼å¨å®ä¹å±é¨åéåå¨å½æ°ä¸ä½¿ç¨å±é¨åéï¼æ¤æ¶æä¸å±é¨åéååçå
¨å±åéåå¨ï¼ï¼å¯¼è´âUnboundLocalError: local variable 'foobar' referenced before assignmentâï¼
å¨å½æ°ä¸ä½¿ç¨å±é¨åæ¥é£ä¸ªèåæ¶ååå¨ååå
¨å±åéæ¶æ¯å¾å¤æçï¼ä½¿ç¨è§åæ¯ï¼å¦æå¨å½æ°ä¸å®ä¹äºä»»ä½ä¸è¥¿ï¼å¦æå®åªæ¯å¨å½æ°ä¸ä½¿ç¨é£å®å°±æ¯å±é¨çï¼åä¹å°±æ¯å
¨å±åéã
è¿æå³çä½ ä¸è½å¨å®ä¹å®ä¹åæå®å½å
¨å±åéå¨å½æ°ä¸ä½¿ç¨ã
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
someVar = 42
def myFunction():
print(someVar)
someVar = 100
myFunction()15ï¼å°è¯ä½¿ç¨ range()å建æ´æ°å表ï¼å¯¼è´âTypeError: 'range' object does not support item assignmentâï¼
ææ¶ä½ æ³è¦å¾å°ä¸ä¸ªæåºçæ´æ°å表ï¼æ以 range() çä¸å»æ¯çææ¤å表çä¸éæ¹å¼ãç¶èï¼ä½ éè¦è®°ä½ range() è¿åçæ¯ ârange objectâï¼èä¸æ¯å®é
ç list å¼ã
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = range(10)
spam[4] = -1ä¹è®¸è¿ææ¯ä½ æ³åï¼
spam = list(range(10))
spam[4] = -1ï¼æ³¨æï¼å¨ Python 2 ä¸ spam = range(10) æ¯è½è¡çï¼å ä¸ºå¨ Python 2 ä¸ range() è¿åçæ¯listå¼ï¼ä½æ¯å¨ Python 3 ä¸å°±ä¼äº§ç以ä¸é误ï¼
16ï¼ä¸éå¨ ++ æè
-- èªå¢èªåæä½ç¬¦ãï¼å¯¼è´âSyntaxError: invalid syntaxâï¼
å¦æä½ ä¹ æ¯äºä¾å¦ C++ , Java , PHP çå
¶ä»çè¯è¨ï¼ä¹è®¸ä½ ä¼æ³è¦å°è¯ä½¿ç¨ ++ æè
-- èªå¢èªåä¸ä¸ªåéãå¨Pythonä¸æ¯æ²¡æè¿æ ·çæä½ç¬¦çã
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
spam = 1
spam++ä¹è®¸è¿ææ¯ä½ æ³åçï¼
spam = 1
spam += 117ï¼å¿è®°ä¸ºæ¹æ³ç第ä¸ä¸ªåæ°æ·»å selfåæ°ï¼å¯¼è´âTypeError: myMethod() takes no arguments (1 given)âï¼
该é误åçå¨å¦ä¸ä»£ç ä¸ï¼
class Foo():
def myMethod():
print('Hello!')
a = Foo()
a.myMethod()