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In Python, how do I convert all of the items in a list to floats?
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map(float, mylist) should do it.
(In Python 3, map ceases to return a list object, so if you want a new list and not just something to iterate over, you either need list(map(float, mylist) - or use SilentGhost's answer which arguably is more pythonic.)
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Python concatenate text files
...f 20 file names, like ['file1.txt', 'file2.txt', ...] . I want to write a Python script to concatenate these files into a new file. I could open each file by f = open(...) , read line by line by calling f.readline() , and write each line into that new file. It doesn't seem very "elegant" to me, e...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...while & (when used with True/False values) tests if both are True.
In Python, empty built-in objects are typically treated as logically False while non-empty built-ins are logically True. This facilitates the common use case where you want to do something if a list is empty and something else i...
Emulate a do-while loop in Python?
I need to emulate a do-while loop in a Python program. Unfortunately, the following straightforward code does not work:
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How to take the first N items from a generator or list in Python? [duplicate]
... # grab the first five elements
You can't slice a generator directly in Python. itertools.islice() will wrap an object in a new slicing generator using the syntax itertools.islice(generator, start, stop, step)
Remember, slicing a generator will exhaust it partially. If you want to keep the entire...
Solving a “communications link failure” with JDBC and MySQL [duplicate]
...need to change the MySQL settings, you can refer to the following files:
Linux: /etc/mysql/my.cnf or /etc/my.cnf (depending on the Linux distribution and MySQL package used)
Windows: C:**ProgramData**\MySQL\MySQL Server 5.6\my.ini (Notice it's ProgramData, not Program Files)
Here are the solutio...
How exactly does the python any() function work?
In the python docs page for any , the equivalent code for the any() function is given as:
5 Answers
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Calculating arithmetic mean (one type of average) in Python
Is there a built-in or standard library method in Python to calculate the arithmetic mean (one type of average) of a list of numbers?
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OAuth: how to test with local URLs?
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You can edit the hosts file on windows or linux
Windows : C:\Windows\System32\Drivers\etc\hosts
Linux : /etc/hosts
localhost name resolution is handled within DNS itself.
127.0.0.1 mywebsite.com
after you finish your tests you just comment the line ...
How to sort with lambda in Python
In Python, I am trying to sort by date with lambda. I can't understand my error message. The message is:
4 Answers
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