QT | Chapter II Basic grammar


 
. delimiter by specifying the string and returns a list of segmentation, default delimiter is all null characters 
similar split () method, but is a string from the last start-split surface. 
'' ' 

Print (' * '* 50) 
S2 = dss.join ([' A ','. ',' C ']) 
Print (' >> S2 ', S2) 
S3 =' S3 ' 
S3 = +' XX ' 
Print (' >> S3 ', S3) 
' '' 
the Join () method is used to specify the elements of a sequence is connected to generate a new character string. 
'' ' 

Print (' * '* 50) 
CSS = "abc1c2c3" 
PI = css.find (' C ') 
Print (' >> PI ', PI) 

Print ( "*" 50 *) 
S1, S2 =' ABC ',' ABC123efg ' 
Print (S1,': uppercase >> ', s1.upper ()) 
Print (S2,': lowercase >> ', s2.lower ()) 
Print (S2, ":

python3 removed CMP () function, but provides a wealth of six comparison operators
print("insert>>",ls1)
import operator # operator must first import module 
operator.gt (1,2) # mean greater than (greater than) 
operator.ge (1,2) # mean greater and equal (or greater) 
operator.eq (1,2 ) # mean equal (equivalent) 
operator.le (1,2) # mean less and equal (or less) 
operator.lt (1,2) # mean less than (less than) 
'' ' 
LS1 = [. 1, 2,3,4] 
LS2 = [8,5,6] 
TP = (11,22,33,44) 
Print ( "CMP >>", operator.gt (LS1, LS2)) 
Print ( "len >>" , len (LS1)) 
Print ( ">> max", max (LS1)) 
Print ( "min >>", min (LS1)) 
Print ( ">> List", List (TP)) 

Print ( "*" 30 *) 
LS1 = [1,2,3,4] 
ls1.append ( 'A') 
Print ( "the append >>", LS1) 
LS1. 
print ( "*" * 30)
print ( "pop >>", ls1.pop ()) # default last 

ls1 = [1,2,3,4,5,6,1,2,3,4,6,5,4] 
ls1.remove (2) 
Print ( "remove >>", LS1) # remove only the first match 
ls1.reverse () 
Print ( 'Reverse >>', LS1) 
ls2.sort () 
Print ( '>> Sort', LS2) 

Print ( '#' * 50, "Dictionary") 
dict1 = { 'A': 97, 'B': 98} 
dict2 = { 'A': 65, 'B': 66} 
# Print ( "CMP> > ", cmp (dict1, dict2)) 
Print (" len >> ", len (dict1)) 
Print (" str >> ", str (dict1)) 
Print (" >> of the type ", of the type (dict1)) 

Print ( "#" * 50, "using the partial function") 
DEF the Add (a, B): 
    return a + B 
Print ( "the Add (. 4 + 2) =", the Add (. 4,2))
p3 = functools.partial(add,3)
p5 = functools.partial(add,5)

r2 = p3(4)
print("p3(4)=",r2)
r3 = p3(7)
print("p(7)=",r3)
r4 = p5(10)
print('p5(7)=',r4)

print('#'*50,"类的动态属性")
class MyClass(object):
    def __init__(self):
        self.__param = None

    def getParam(self):
        print("get param:%s " % self.__param)
        return self.__param

    def setParam(self,value):
        print("set param:%s " % self.__param)
        self.__param = value

    def delParam(self):
        print("del param:%s " % self.__param)
        del self.__param
        
    param= property(getParam,setParam,delParam)

class MyClass1(object):
    def __init__(self):
        self.__param = None
    @property
    def param(self):
        print("get param: %s " % self.__param)
        return self.__param
    @param.setter
    def param(self,value):
        print("set param: %s " % self.__param)
        self.__param = value
    @param.deleter
    def param(self):
        print("del param: %s " %self.__param)
        del self.__param
if __name__ == '__main__':
    cls = MyClass()
    cls.param = 10
    print("current param:%s " % cls.param)
    del cls.param

    print("*"*30)
    cls1 = MyClass1()
    cls1.param = 10
    print("current param: %s " % cls1.param) 
    del cls1.param
QT | Chapter II Basic grammar

Guess you like
