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We can search in the file line by line or by creating a single string for the whole content of the file.
check = 0 with open("/cxldata/python_sample_file") as f: for line in f: if(line.startswith('w')): check = check + 1
startswith function checks if the string is starting with the argument mentioned in the brackets.
startswith
Basically, here were searching for the lines in the file which are starting with 'w'.
'w'
Can you tell the value of check after the above code is executed?
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1 Why Programming?
2 A Quick Introduction
3 Python as a Calculator
4 Order of Operations in Python
5 Advanced Operations in Python
6 Variables in Python
7 Calculations with Variables
8 Hands-on on Python Variables
9 Types of Variables in Python
10 Guess the Type
11 Operations with Other Types
12 Functions
13 Built-in Functions
14 Type Conversion Functions
15 Math Functions
16 Random Number Generation
17 Making your own functions
18 Flow of Execution
19 Parameters and Arguments
20 Types of Functions
21 Input from User
22 Comments
23 Boolean Expressions
24 Logical Operators
25 Conditional Execution
26 Visualize the Conditional
27 Catching Exceptions
28 Updating Variables
29 While loop
30 Break and Continue
31 For loop
32 Strings
33 String Slices
34 Immutability of Strings
35 in Operator
36 String methods
37 Parsing Strings
38 Format Operator
39 Lists
40 Lists v/s Strings
41 List Methods
42 Deleting Elements of List
43 Lists and Strings
44 Dictionaries
45 Working with Dictionaries
46 Tuples
47 Working with Tuples
48 Comparison with Tuples
49 Tuple Assignment
50 Tuples and Dictionaries
51 Python - Understanding Files
52 Reading Files
53 Searching in Files
54 Writing Files
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