To print the % sign you need to ‘escape’ it with another % sign: percent = 12 print “Percentage: %s %%\n” % percent # Note the double % sign >>> Percentage: 12 % EDIT Nowadays in python3 a better (and more readable) approach is to use f-strings. Note that other solutions (shown below) do work … Read more
Edit – Since Python 3.3, the u” literal works again, so the u() function isn’t needed. The best option is to make a method that creates unicode objects from string objects in Python 2, but leaves the string objects alone in Python 3 (as they are already unicode). import sys if sys.version < ‘3’: import … Read more
Situation in Python3 according to the docs: io.open(file, *[options]*) This is an alias for the builtin open() function. and While the builtin open() and the associated io module are the recommended approach for working with encoded text files, this module [i.e. codecs] provides additional utility functions and classes that allow the use of a wider … Read more
While the question is for Python 2.7 and already has an excellent answer, I had the same question for Python 3.3 and this thread was the closest thing to an answer I could find with Google. I found a better solution for Python 3.x by digging through the Python documentation, and I’m sharing my findings … Read more
Found a blog post that reveals explicitly specifying TEST_RUNNER = ‘django.test.runner.DiscoverRunner’ in settings.py will stop this warning from occurring.
Behind the scenes a scientific number notation is always represented as a float internally. The reason is the varying number range as an integer only maps to a fixed value range, let’s say 2^32 values. The scientific representation is similar to the floating representation with significant and exponent. Further details you can lookup in https://en.wikipedia.org/wiki/Floating_point. … Read more
I ended up using jsbeautifier: import jsbeautifier opts = jsbeautifier.default_options() opts.indent_size = 2 jsbeautifier.beautify(json.dumps(d), opts) Output: { “a”: “blah”, “c”: [1, 2, 3], “b”: “foo” }
1) Keys must not be mutable, unless you have a user-defined class that is hashable but also mutable. That’s all that’s forced upon you. However, using a hashable, mutable object as a dict key might be a bad idea. 2) By not sharing values between the two dicts. It’s OK to share the keys, because … Read more
From the docs (see here): The standard streams are in text mode by default. To write or read binary data to these, use the underlying binary buffer. For example, to write bytes to stdout, use sys.stdout.buffer.write(b’abc’). But, as in the accepted answer, invoking python with a -u is another option which forces stdin, stdout and … Read more
You should not exit your worker instance sys.exit(1) Furthermore you ‘re catching the wrong Error. What you could do for for example is: from requests.exceptions import ConnectionError try: r = requests.get(“http://example.com”, timeout=0.001) except ConnectionError as e: # This is the correct syntax print e r = “No response” In this case your program will continue, … Read more