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How to read a .xlsx file using the pandas Library in iPython?
...ion 0.21.0+ you will get this behavior more cleanly by passing sheet_name=None to read_excel:
dfs = pd.read_excel(file_name, sheet_name=None)
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecated in favor of the above):
dfs = pd.read_excel(file_name, sheetname=No...
What does “O(1) access time” mean?
...rm that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean?
...
Show constraints on tables command
...i don't think it shows the incoming fk relations? as in for example, a.col_one references b.col_one and in show create table b will not contain detail about the aforementioned relation.
– Vineet Menon
Oct 10 '14 at 9:44
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How to check if IEnumerable is null or empty?
...ly (although that still means it is consumed) - it might only need to read one element (especially if there is no predicate). As such, since sequences (IEnumerable<T>) do not need to be repeatable, that might be it. Any() without a predicate is essentially equivalent to foreach(var x in sequen...
Viewing all defined variables [duplicate]
...magics available. IPython is basically the Python interpreter on steroids. One convenient magic is store, which lets you save variables between sessions (using pickle).
Note: I am not associated with IPython Dev - just a satisfied user.
Edit:
You can find all the magic commands in the IPython Doc...
Determine whether an array contains a value [duplicate]
...rding to the ES5 spec, this method will behave differently from the native one in case ofsigned zeroes and NaNs (see 15.4.4.14 and 9.12 vs. 11.9.6)
– Christoph
Jul 25 '09 at 9:26
4...
How do I detect if software keyboard is visible on Android Device or not?
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Thanks for this snippet, I have one question that is this code required to remove listener?
– Pratik Butani
Aug 16 '19 at 6:54
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How to find the Git commit that introduced a string in any branch?
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+1 for excellence. Pointing at -S is one thing, explaining things, better. Also, I like to use --decorate to see what branches things come from
– sehe
Apr 28 '11 at 9:25
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Paste multiple columns together
...- c("b", "c", "d")
You can add the new column to data and delete the old ones with
data$x <- do.call(paste, c(data[cols], sep="-"))
for (co in cols) data[co] <- NULL
which gives
> data
a x
1 1 a-d-g
2 2 b-e-h
3 3 c-f-i
...
Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
... stuck here, but the solution is easy. There a few options but this is the one I like. Type the following commands:
sudo apt-get install libcap2-bin
sudo setcap cap_net_bind_service=+ep `readlink -f \`which node\``
Now, when you tell a Node application that you want it to run on port 80, it will ...