Python String

How to Convert a String to a Dictionary in Python?

Problem Formulation Given a string representation of a dictionary. How to convert it to a dictionary? Input: ‘{“1”: “hi”, “2”: “alice”, “3”: “python”}’ Output: {‘a’: 1, ‘b’: 2, ‘c’: 3} Method 1: eval() The built-in eval() function takes a string argument, parses it as if it was a code expression, and evaluates the expression. If …

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How to Convert a Unicode String to a Dictionary in Python?

Problem Formulation Given a Unicode string representation of a dictionary. How to convert it to a dictionary? Input: u”{‘a’: 1, ‘b’: 2, ‘c’: 3}” Output: {‘a’: 1, ‘b’: 2, ‘c’: 3} Note: The u’string’ representation represents a Unicode string that was introduced in Python 3. This is redundant as all strings in Python 3 are …

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How to Interleave Two Strings of Variable Lengths in Python?

Half an hour ago, my friend and coauthor of the textbook “Coffee Break NumPy” asked me the following question via WhatsApp: Problem Formulation How would you solve the problem of interleaving two strings in Python: Input: String s1= “AAA” and string s2 = “BBBBB” Output: String s=”ABABABBB” Being obsessed with finding the most Pythonic way …

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How to Print a NumPy Array Without Brackets in Python?

Note that this tutorial concerns NumPy arrays. To learn how to print lists without brackets check out this tutorial: How to Print a List Without Brackets in Python? Problem Formulation Given a NumPy array of elements. If you print the array to the shell using print(np.array([1, 2, 3])), the output is enclosed in square brackets …

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How to Print a Tuple Without Parentheses in Python?

Problem Formulation Given a tuple of elements. If you print the tuple to the shell using print((1, 2, 3)), the output is enclosed in parentheses like so: (1, 2, 3). But you want the list without brackets like so: 1, 2, 3. How to print the tuple without enclosing parentheses? Method 1: Unpacking The asterisk …

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How to Print a Dictionary Without Brackets in Python?

Problem Formulation Given a dictionary of key value pairs in Python. If you print the dictionary to the shell using print({‘a’: 1, ‘b’: 2}), the output is enclosed in curly brackets (braces) like so: {‘a’: 1, ‘b’: 2}. But you want the dictionary without brackets like so: ‘a’: 1, ‘b’: 2. How to print the …

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Python Print Without Extra Newline When Reading a File

Problem Formulation Given a file with name file.txt and the following content: hi finxters! 🙂 You created a Python script that reads the file line-by-line and prints each line to the shell like so: But the output unexpectedly adds an extra newline to each line so you obtain the following output on the Python shell: …

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