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Answer Posted / praveen
Python has a vast number of functions, and it's difficult to give an exact count. However, I can provide an overview:
*Built-in Functions:* approximately 70-80 functions, including:
1. Mathematical functions (e.g., `abs`, `pow`, `round`)
2. String functions (e.g., `len`, `upper`, `lower`)
3. List functions (e.g., `append`, `sort`, `reverse`)
4. Dictionary functions (e.g., `keys`, `values`, `items`)
5. File I/O functions (e.g., `open`, `read`, `write`)
6. Exception handling functions (e.g., `try`, `except`, `raise`)
*Standard Library Functions:* over 1,000 functions, including:
1. `os` module (e.g., `mkdir`, `rmdir`, `chdir`)
2. `sys` module (e.g., `exit`, `argv`, `stdin`)
3. `re` module (regular expressions)
4. `math` module (e.g., `sin`, `cos`, `tan`)
5. `statistics` module (e.g., `mean`, `median`, `stdev`)
6. `itertools` module (e.g., `chain`, `cycle`, `accumulate`)
7. `functools` module (e.g., `partial`, `reduce`, `cmp_to_key`)
*External Libraries and Frameworks:* countless functions, including:
1. NumPy (e.g., `array`, `dot`, `reshape`)
2. Pandas (e.g., `DataFrame`, `read_csv`, `groupby`)
3. Matplotlib (e.g., `plot`, `hist`, `imshow`)
4. Scikit-learn (e.g., `LinearRegression`, `DecisionTreeClassifier`, `SVM`)
5. Django (e.g., `HttpResponse`, `render`, `redirect`)
*User-defined Functions:* unlimited!
You can define your own functions using the `def` keyword.
To explore Python's built-in and standard library functions, visit the official Python documentation:
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