Python Exercises (i)

1. Achieve 1-100 of all and

def qiuhe (x, y):
return x + y

he = 0
For I in Xrange (1, 101):
He =qiuhe (he,i)
Print (He)

2. Achieve 1-500 of all odd and

def is_odd (x):
    return x% 2 = = 1
def qiuhe (x, y):
    return x + y

he = 0
For I in Filter (Is_odd,xrange (1,501)):
    Print (i)
    he = Qiuhe (He, I)
Print (He)

3. Ask for 1+ 2! + 3! + 4! + ... 20! and the

def qiuhe (x, y):
    return x + y

def Jiecheng (n):
    if (n<=1):
        Return 1
    Else
        Return Jiecheng (n-1) *n

he = 0
For I in Xrange (1, 21):
    He +=jiecheng (i)
Print (He)

4. Sort the specified list [2,32,43,453,54,6,576,5,7,6,8,78,7,89]

List.sort () is sorted locally and does not return a copy
Or

def cmp_value (x, y):
    If x > Y:
        Return 1
    Elif x < y:
        Return-1
    Else
        return 0

LISTSORTED=[2,32,43,453,54,6,576,5,7,6,8,78,7,89]
So=sorted (Listsorted,cmp=cmp_value)
Print (SO)

5. Dictionary sorting, string, list, tuple common methods

Dictionary sort:

Import operator
D = {' Data1 ': 3, ' data2 ': 1, ' data3 ': 2, ' DATA4 ': 4}
Print (sorted (D.iteritems (), Key=operator.itemgetter (1))

List

classmates = [' Michael ', ' Bob ', ' Tracy ']
#len
Print (len (classmates))

#index
Print (Classmates[0])

#-1
Print (Classmates[-1])

#append
Classmates.append (' Adam ')
Print (classmates)

#insert
Classmates.insert (1, ' Jack ')
Print (classmates)

#pop
Classmates.pop (1)
Print (classmates)

Python Exercises (i)