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Python ValueError: too many values to unpack [duplicate]
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self.materials is a dict and by default you are iterating over just the keys (which are strings).
Since self.materials has more than two keys*, they can't be unpacked into the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, to iterate over the keys and the values (the tup...
How do I activate a virtualenv inside PyCharm's terminal?
...yCharm) and activated that environment as my Interpreter. Everything is working just fine.
22 Answers
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How to convert a char array back to a string?
... So the need for splitting a String into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a zero byte on one side and string on the other side and many conversions between them due do legacy methods.
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Get string character by index - Java
I know how to work out the index of a certain character or number in a string, but is there any predefined method I can use to give me the character at the nth position? So in the string "foo", if I asked for the character with index 0 it would return "f".
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How to check size of a file using Bash?
I've got a script that checks for 0-size, but I thought there must be an easier way to check for file sizes instead. I.e. file.txt is normally 100k; how to make a script check if it is less than 90k (including 0), and make it do wget a new copy because the file is corrupt in this case.
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Converting integer to string in Python
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>>> str(10)
'10'
>>> int('10')
10
Links to the documentation:
int()
str()
Conversion to a string is done with the builtin str() function, which basically calls the __str__() method of its parameter.
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time.sleep — sleeps thread or process?
In Python for *nix, does time.sleep() block the thread or the process?
7 Answers
7
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How do I get the find command to print out the file size with the file name?
...sion) or find . -name '*.ear' -print0 | xargs -0 ls -lh. Also you may like to add -type f if you're only interested in files (or add -d to ls if you want directories themselves included without their contents).
– ash108
Mar 24 '12 at 14:36
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C++ performance challenge: integer to std::string conversion
Can anyone beat the performance of my integer to std::string code, linked below?
13 Answers
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How can I multiply and divide using only bit shifting and adding?
... and shifting you want to decompose one of the numbers by powers of two, like so:
21 * 5 = 10101_2 * 101_2 (Initial step)
= 10101_2 * (1 * 2^2 + 0 * 2^1 + 1 * 2^0)
= 10101_2 * 2^2 + 10101_2 * 2^0
= 10101_2 << 2 + 10101_2 << 0 (Decomposed)
= 1...