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How to read a .xlsx file using the pandas Library in iPython?
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I usually create a dictionary containing a DataFrame for every sheet:
xl_file = pd.ExcelFile(file_name)
dfs = {sheet_name: xl_file.parse(sheet_name)
for sheet_name in xl_file.sheet_names}
Update: In pandas version...
When should I use perror(“…”) and fprintf(stderr, “…”)?
...should use fprintf(stderr, fmt, ...). For example, strtol will return LONG_MAX or LONG_MIN if a string is out of range and set errno to ERANGE. So if strtol fails due to out of range, I would use perror.
– freeboy1015
Aug 24 '12 at 2:22
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Selenium WebDriver: Wait for complex page with JavaScript to load
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If anyone actually knew a general and always-applicable answer, it would have been implemented everywhere ages ago and would make our lives SO much easier.
There are many things you can do, but every single one of them has a problem:
As...
What's the main difference between int.Parse() and Convert.ToInt32
...u'd use Int32.Parse().
If you're collecting input from a user, you'd generally use Int32.TryParse(), since it allows you more fine-grained control over the situation when the user enters invalid input.
Convert.ToInt32() takes an object as its argument. (See Chris S's answer for how it works)
Conv...
How to configure socket connect timeout
... Another thing too look out for... If instead of putting null in for the callback and you plan to EndConnect(), if the socket has been closed then this will give you an exception. So make sure you check...
– poy
Jan 28 '13 at 16:50
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Error-Handling in Swift-Language
...ragon
Note: there is no specification for type of error the function actually can throw. This declaration simply states that the function can throw an instance of any type implementing ErrorType or is not throwing at all.
2. Invoking function that may throw errors
In order to invoke function you...
What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
...e page's data with a single query and are well suited for content oriented applications (which is why big sites like Facebook or Amazon like them).
Other kinds of NoSQL databases include column-oriented stores, graph databases and even object databases. But this goes beyond the question.
See also
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How to write lists inside a markdown table?
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@TreborRude No, because Markdown is not HTML actually. But if you use a library (e.g. marked), you probably have this feature (to combine HTML with markdown).
– Ionică Bizău
Aug 5 '14 at 12:59
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In Firebase, is there a way to get the number of children of a node without loading all the node dat
...a transaction secure though? It seems it could be easily hacked to artificially increase counts. This could be bad for voting systems.
– Soviut
Apr 7 '14 at 6:10
16
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Java - get pixel array from image
... is to be able to address pixel (x, y) from the image using int[x][y] . All the methods I have found do not do this (most of them return int[] s).
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