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In this tutorial, you'll learn how and when to use the len() Python function. You'll also learn how to customize your class definitions so that objects of a user-defined class can be used as arguments in len().
>>> from pdfrw import PdfReader >>> pdf = PdfReader('example.pdf') >>> pdf.pages[0].MediaBox ['0', '0', '595.2756', '841.8898'] Lengths are given in points (1 pt = 1/72 inch). The format is [x0, y0, x1, y1] (thanks, mara004!).
The following example shows how to use the len() function to get the length of a string, the number of elements in a tuple, and the number of items in a range: s = 'Python' print(len(s)) # 👉 6 seasons = ('Spring', 'Summer', 'Autumn', 'Winter') print(len(seasons)) # 👉 4 r = range(1, 10) print(len(r)) # 👉 9 Code language: Python (python)
30 wrz 2024 · reader = PdfReader('example.pdf') Here, we create an object of PdfReader class of pypdf module and pass the path to the PDF file & get a PDF reader object. print(len(reader.pages)) pages property gives the number of pages in the PDF file. For example, in our case, it is 20 (see first line of output). pageObj = reader.pages[0]
Python’s built-in function len() is the tool that will help you with this task. There are some cases in which the use of len() is straightforward. However, there are other times when you’ll need to understand how this function works in more detail and how to apply it to different data types.
len() is a built-in function in Python 3. This method returns the length (the number of items) of an object. It takes one argument x .
IF Statements. The IF statement is used to check if a condition is true. Essentially, if the condition is true, the Python interpreter runs a block of statements called the if-block. If the statement is false, the interpreter skips the if block and processes another block of statements called the else-block.
