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Calling a Fragment method from a parent Activity
...et a reference to the fragment in the first place. It's not defined in an XML layout, so I can't use findFragmentById(). And it's not clear to me from the code I'm following (ref above) how/where the fragment is even created. If it were I could just add a tag and use findFragmentByTag(). The Acc...
How do you generate dynamic (parameterized) unit tests in python?
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Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/parameterized/parameterized.py", line 233, in <lambda>
standalone_func = lambda *a: func(*(a + p.args), **p.kwargs)
File "x.py", line 12, in test_sequence
self.assertEqual(a,b)
Assertio...
Logical operators for boolean indexing in Pandas
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When you say
(a['x']==1) and (a['y']==10)
You are implicitly asking Python to convert (a['x']==1) and (a['y']==10) to boolean values.
NumPy arrays (of length greater than 1) and Pandas objects such as Series do not have a boolean value -- in other words, they raise
ValueError: The truth v...
Text Progress Bar in the Console [closed]
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Python 3
A Simple, Customizable Progress Bar
Here's an aggregate of many of the answers below that I use regularly (no imports required).
Note: All code in this answer was created for Python 3; see end of answer to use this c...
Why doesn't print work in a lambda?
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A lambda's body has to be a single expression. In Python 2.x, print is a statement. However, in Python 3, print is a function (and a function application is an expression, so it will work in a lambda). You can (and should, for forward compatibility :) use the back-ported pri...
How do I pass extra arguments to a Python decorator?
...ckoverflow.com%2fquestions%2f10176226%2fhow-do-i-pass-extra-arguments-to-a-python-decorator%23new-answer', 'question_page');
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Post as a guest
Name
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Using global variables in a function
...magine the reason for it is that, since global variables are so dangerous, Python wants to make sure that you really know that's what you're playing with by explicitly requiring the global keyword.
See other answers if you want to share a global variable across modules.
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How did Google manage to do this? Slide ActionBar in Android application
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}
}
Then, the layouts:
Layout of the menu (res/layout/menu.xml)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:or...
What is memoization and how can I use it in Python?
I just started Python and I've got no idea what memoization is and how to use it. Also, may I have a simplified example?
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What is the EAFP principle in Python?
What is meant by "using the EAFP principle" in Python? Could you provide any examples?
3 Answers
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