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| print():
print('abc'+abc)
print('abc',end='')
print('abc','def')
print('abc','def',sep=',')
print('asdf'+\
'asdf')
print('''asdfasdf
asdfasdf
asdf''')
"""asdf
asdf
"""
input():
abc=input()
len():
len(abc)
str():
print('abc'+str(1)+'abc')
int():
int('42')
int(1.99)
float():
float('3.14')
type(...)
id(...)
if name=='alice':
print(...)
else:
print(...)
if name=='alice':
print('abc')
elif age<12
print('abc')
break
continue
for i in range(5):
for i in range(12,16):
for i in range(0,10,2):
for i in range(5,-1,-1):
def abc(a):
...
try:
...
except ZeroDivisionError:
...
TypeError
NameError
SyntaxError
UnboundLocalError
ZeroDivisionError 被0除
KeyboardInterrupt Ctrl-C
IndexError 列表
AttributeError
KeyError 字典
spam=[['cat','bat'],[10,20,30,40,50]]
spam[0]
spam=['cat','bat','rat','elephant']
spam[-1]
spam[1:3]
spam[0:-1]
spam[:2]
spam[1:]
spam[:]==spam
len(spam)==4
[1,2,3]+['A','B','C']=[1,2,3,'A','B','C']
del spam[2]
spam.index('cat')==1
spam.append(...)
spam.insert(1,'chicken')
spam.remove('cat')
spam.sort()
spam.sort(key=str.lower)
spam.reverse()
list([...])
tuple((...))
mycat={'size':'fat','color':'gray','disposition':'loud'}
mycat=dict(size='fat',color='gray',disposition='loud')
mycat['size']
list(mycat)
for v in spam.values():
for k in spam.keys():
for i in spam.items():
for k,v in spam.items():
spam.get('cups',0)
spam.setdefault('color','black')
spam="asdf'asdf"
'abc%s asdf%s asdf'%(name,age)
f'asdf{name}asdf{age+1}'
spam=spam.upper()
spam=spam.lower()
spam.isupper()
spam.islower()
spam.isalpha()
spam.isalnum()
spam.isdecimal()
spam.isspace()
spam.istitle()
spam.startswith()
spam.endswith()
'abc'.join(['1','2','3','4'])
'1abc2abc3abc4'.split('abc')
'abcdefghij'.partition('f')
'abcdefghij'.partition('z')
'Hello'.ljust/rjust/center(10)
'Hello'.ljust/rjust/center(20,'=')
' Hello '.strip/lstrip/rstrip()
ord()
chr()
helloFile=open('...','r',encoding='utf-8')
"""
详细说明：
文件必须存在：
r 只读，指针在开头
rb 二进制只读，指针在开头
r+ 可读，可从头覆盖
rb+ 二进制读写，指针在开头
文件存在则覆盖，不存在则创建：
w 只写
wb 二进制只写
w+ 清空后读写
wb+ 二进制读写
文件存在则指针在末尾，否则创建新文件：
a 追加
ab 二进制追加
a+ 读写
ab+ 二进制追加
"""
"""string""" helloFile.read()
"""list""" helloFile.readlines()
helloFile.write(...)
helloFile.close()
try:
raise Exception('...')
except Exception as err:
print('...'+str(err))
assert ...
folder_name=os.path.dirname(__file__)
|
