#1. Define string. s1 = "hello and python and java and sql and scala" #2. Demonstrate the above functions. print(('and')) #6. Because a string consists of multiple characters, the index of the first character of the string will be returned by default. print(('and', 7, 30)) # 17 print(('and', 7, 19)) #-1, the left and right packages are not included, the index cannot be retrieved 19 print('-' * 28) print(('and')) #6. Because a string consists of multiple characters, the index of the first character of the string will be returned by default. print(('and', 7, 30)) # 17 #print(('and', 7, 19)) # Report an error print('-' * 28) #Demonstrate the effects of rfind() and rindex() are the same, the difference is whether an error is reported when it cannot be found. print(('and')) # 34 print(('and', 10, 30)) # 26 print(('and', 10, 19)) # -1 print('-' * 28) print(('and')) # 34 print(('and', 10, 30)) # 26 #print(('and', 10, 19)) # If not found, an error will be reported
#1. Define the string variable s1 and record the data to be operated. s1 = 'hello and python and sql and linux' #2. Demonstrate the replace() function. s2 = ('and', 'or') #Don't write a number, replace all s3 = ('and', 'or', 2) #Write a number, write a few to replace several. #3. Print the result: print(f's1: {s1}') #s1 is an immutable type and the content remains unchanged. print(f's2: {s2}') print(f's3: {s3}') print('-' * 28) #4. Demonstrate the split() function. list1 = ('and') print(type(list1)) #<class 'list'> list is also a type of container type. print(list1) # ['hello ', ' python ', ' sql ', ' linux'] list2 = ('and', 2) print(type(list2)) #<class 'list'> list is also a type of container type. print(list2) # ['hello ', ' python ', ' sql and linux'] print('-' * 28) #Extension: len() function, obtains the length of the string, that is: how many characters does the string have. print(len(s1)) # 34 print('-' * 28) #Delimiter.join(string) Separates each character in the string with a delimiter. s4 = 'hello' s5 = ','.join(s4) print(s5) # h,e,l,l,o #Requirements: Put 'hello' => ['h', 'e', 'l', 'l', 'o'] list3 = ','.join(s4).split(',') print(list3) # ['h', 'e', 'l', 'l', 'o']