大约有 5,685 项符合查询结果（耗时：0.0170秒） [XML]
How to add an extra column to a NumPy array
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@JoshAdel: I tried your code on ipython, and I think there's a syntax error. You might want to try changing a = np.random.rand((N,N)) to a = np.random.rand(N,N)
– hlin117
Apr 11 '15 at 15:23
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Regex to get string between curly braces
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...and Python just has slicing, which IMO is better than anything else :p.
– Grant Paul
Mar 3 '10 at 6:25
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Pandas - How to flatten a hierarchical index in columns
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The most pythonic way to do this to use map function.
df.columns = df.columns.map(' '.join).str.strip()
Output print(df.columns):
Index(['USAF', 'WBAN', 'day', 'month', 's_CD sum', 's_CL sum', 's_CNT sum',
's_PC sum', 'temp...
Interfaces — What's the point?
...s from IPizza is guaranteed to be orderable, as it has an Order() method.
Python is not statically-typed, therefore types are kept and looked up at runtime. So you can try calling an Order() method on any object. The runtime is happy as long as the object has such a method and probably just shrugs ...
Regex to validate password strength
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codaddict's solution works fine, but this one is a bit more efficient: (Python syntax)
password = re.compile(r"""(?#!py password Rev:20160831_2100)
# Validate password: 2 upper, 1 special, 2 digit, 1 lower, 8 chars.
^ # Anchor to start of string.
(?=(?:[^A-Z]*[...
Why is C so fast, and why aren't other languages as fast or faster? [closed]
...aster because almost everything else is written in C.
Java is built on C, Python is built on C (or Java, or .NET, etc.), Perl is, etc. The OS is written in C, the virtual machines are written in C, the compilers are written in C, the interpreters are written in C. Some things are still written in...
How can I open a cmd window in a specific location?
... need to use cd /d. For example:
C:\Windows\System32\cmd.exe /K "cd /d H:\Python\"
(documentation)
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How can I strip all punctuation from a string in JavaScript using regex?
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Python's string.punctuation defines punctuation as: !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ Which works better for me, so another alternative would be: replace(/['!"#$%&\\'()\*+,\-\.\/:;<=>?@\[\\\]\^_`{|}~']/g,""...
How to create dictionary and add key–value pairs dynamically?
...dict = {};
dict['key'] = "testing";
console.log(dict);
works just like python :)
console output:
Object {key: "testing"}
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random.seed(): What does it do?
I am a bit confused on what random.seed() does in Python. For example, why does the below trials do what they do (consistently)?
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