Built-in data type Method: string

Built-in data type Method: string

• Uses:

Describe the nature of things, such as names, hobbies, address and so on.

• Definition:

Use '', "" "" "" "" a string of characters wrapped

name = 'jin'  # name = str('jin')
s1 = str(1.1)
s2 = str([1,2,3])

print(s1,type(s1))  # 1.1 <class 'str'>
print(s2,type(s2))  # [1, 2, 3] <class 'str'>

Built-in method

• Priority grasp:

1. By index value (forward + reverse take take): Only take.
2. Sections (care regardless of the end, step).
3. Learn negative value.
4. Length len.
5. Members of the operations in and not in: judge whether there is a sub-string in a large string.
6. Removing the left and right sides of the character string strip, regardless of the middle.
7. Segmentation split: some delimiter character strings for tissue, can be cut into split list for further value.
8. cycle.

• Need to know

1. strip,lstrip,rstrip
2. lower,upper
3. startswith,endswith
4. Three play format
5. split, rsplit
6. join
   
7. isdigit determines whether the string contains purely digital

• To understanding

1. find,rfind,index,rindex,count
2. center, bright, rjust, zfill
3. expandtabs
4. captalize, swapcase, title
5. It is a digital series