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Change Pandas default NA type promotions


By : Noreaster
Date : August 02 2020, 01:00 PM
Any of those help You can use object to ensure that pandas leaves the data unchanged. Then you can manually set the types.
code :
pd.DataFrame(data=test_with_nan_df, columns=['dataset_id'], dtype='object').astype('Int64')
#           dataset_id
#0  327626200612520493
#1                 NaN

#dataset_id    Int64


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Default argument promotions in C function calls


By : Kip
Date : March 29 2020, 07:55 AM
I wish this helpful for you Upvoted AProgrammer's answer—those are the real goods.
For those of you who are wondering why things are this way: in the dark ages before 1988, there was no such thing as a function prototype in classic "K&R" C, and the default argument promotions were instituted because (a) there were essentially "free", as it costs no more to put a byte in a register than to put a word in a register, and (b) to cut down on potential errors in parameter passing. That second reason never quite cut it, which was why the introduction of function prototypes in ANSI C was the single most important change ever in the C language.

Default argument promotions in C99 standard


By : Vadhir Bhupathi
Date : March 29 2020, 07:55 AM
may help you . No they are not contradictory.
A declaration is not necessarily a prototype:
code :
int f();
int (a)
 in a;
{
 ...
}

When will default argument promotions happen?


By : PSWarrior
Date : March 29 2020, 07:55 AM
will be helpful for those in need Default promotions will happen before the function is called, in the calling context.
If you're really asking about the circumstances under which default promotions are carried out, that's covered in the excerpt, though it's such a tiny piece that it's easy to miss: "When there is no parameter for a given argument...". In other words, it's essentially identical to the situation in C, with the exception that a C-style function declaration that doesn't specify parameter types simply doesn't exist in C++. Therefore, the only time you can have an argument without a parameter specifying its type is when a function has an explicit ellipsis, such as printf: int printf(char const *format, ...);.

What default promotions of types are there in the variadic arguments list?


By : anand bhunia
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Look in the draft n1256 (C99 with Technical corrigenda TC1, TC2, and TC3 included) for 6.5.2.2 Function calls:
For functions without prototype, or parameters corresponding to the ellipsis ..., the default argument promotions are performed.

Type trait to obtain default argument promotions


By : Pidgie106
Date : March 29 2020, 07:55 AM
this will help Here's a skeleton of a solution that works for "most" types (integral, float, unscoped enumeration, arrays, pointers, pointers-to-member, functions, function pointers).
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