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What's the difference between lists enclosed by square brackets and parentheses in Python?
... = {}
>>> z[x] = 3
>>> z
{(1, 2): 3}
>>> z[y] = 4
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
Note that, as many people have pointed out, you can add tuples together. For example:
>>>...
No provider for “framework:jasmine”! (Resolving: framework:jasmine)
...n": "0.0.0",
"dependencies": {},
"devDependencies": {
"grunt": "~0.4.1",
"grunt-autoprefixer": "~0.4.0",
"grunt-bower-install": "~0.7.0",
"grunt-concurrent": "~0.4.1",
"grunt-contrib-clean": "~0.5.0",
"grunt-contrib-coffee": "~0.7.0",
"grunt-contrib-compass": "~0.6.0"...
efficient circular buffer?
...range(20):
... d.append(i)
...
>>> d
deque([10, 11, 12, 13, 14, 15, 16, 17, 18, 19], maxlen=10)
There is a recipe in the docs for deque that is similar to what you want. My assertion that it's the most efficient rests entirely on the fact that it's implemented in C by an incredibly s...
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How do I check out version version/tag 1.1.4 of the rspec bundle ?
2 Answers
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Creating Multifield Indexes in Mongoose / MongoDB
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Numpy index slice without losing dimension information
...Joe Kington
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Pandas dataframe get first row of each group
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248
>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 ...
How do you pass arguments to define_method?
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finding and replacing elements in a list
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>>> a= [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
>>> for n, i in enumerate(a):
... if i == 1:
... a[n] = 10
...
>>> a
[10, 2, 3, 4, 5, 10, 2, 3, 4, 5, 10]
...
how to mysqldump remote db from local machine
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4 Answers
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