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Working with Strings in Python

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[开发(python) 所属分类 开发(python) | 发布者 店小二03 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏
Strings in python are identified as a continuous set of characters represented in the quotation marks.We can access subset of strings using Index [] operator. Slicing methods: str = ‘SQLZealots’ print(‘str = ‘, str) #first character print(‘str[0] = ‘, str[0]) #last character print(‘str[-1] = ‘, str[-1]) #slicing 2nd to 5th character print(‘str[1:5] = ‘, str[1:5]) #slicing 6th to 2nd last character print(‘str[5:-2] = ‘, str[5:-2])

we have many built in methods with strings. I have listed couple of them and have shown the o/p of each method with an example.

string.upper() # get all-letters in uppercase

string.lower() # get all-letters in lowercase

string.capitalize() # capitalize the first letter

string.title() # capitalize the first letter of words

string.swapcase() # converts uppercase and lowercase

string.strip() # remove all white spaces

string.lstrip() # removes white space from left

string.rstrip() # removes white space from right

string.split() # splitting words

string.split(‘,’) # split words by comma

string.count(‘l’) # count how many times l is in the string

string.find(‘Wo’) # find the word Wo in the string

string.index(“Wo”) # find the letters Wo in the string

“:”.join(string) # add a : between every char

” “.join(string) # add a white space between every char

len(string) # find the length of the string


Working with Strings in Python

Lets write a small program ,to extract the Numbers only from a given string .


Working with Strings in Python

You can find the SQL version of the code fromhere.

Hope you enjoyed the post. Please share your comments .

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