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how format specifier taking value while tuple list is passed


how format specifier taking value while tuple list is passed

By : Jorge Antonio Muñoz
Date : November 23 2020, 03:01 PM
hop of those help? I have a piece of code as below: , First, the easy question:
code :
>>> '%s:%d' % ('css', 115)  # tuple is seen as two elements
'css:115'
>>> '%s:%d' % ['css', 115]  # list is just seen as one object!
TypeError: not enough arguments for format string
>>> '%s' % []
'[]'
>>> '%s' % ((),)
'()'
>>> '%s' % ()
TypeError: not enough arguments for format string
>>> import ast
>>> ast.dump(ast.parse('"%s" % val'))
"Module(body=[Expr(value=BinOp(left=Str(s='%s'), op=Mod(), right=Name(id='val', ctx=Load())))])"


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taking the first type in the list of tuple

taking the first type in the list of tuple


By : ron
Date : March 29 2020, 07:55 AM
hop of those help? I had a list l has type: l: list (list (A * B * C * D)) and I would like it returns for me a type list (list A) , I would do it like this:
code :
π1 : A × B → A
π1 ∘ π1 : A × B × C → A
π1 ∘ π1 ∘ π1 : A × B × C × D → A
map (π1 ∘ π1 ∘ π1) : (A × B × C × D) * → A *
map (map (π1 ∘ π1 ∘ π1)) : ((A × B × C × D) *) * → (A *) *
Definition comp {s1 s2 s3 : Set} (f2 : s2 -> s3) (f1 : s1 -> s2) (o1 : s1) : s3 :=
  f2 (f1 o1).

Notation "f2 ∘ f1" := (comp f2 f1) (at level 30, right associativity).

Inductive Prod (s1 s2 : Set) : Set :=
  | Pair : s1 -> s2 -> Prod s1 s2.

Arguments Pair {_ _} _ _.

Notation "s1 × s2" := (Prod s1 s2) (at level 40, left associativity).

Notation "( o1 , o2 , .. , o3 )" := (Pair .. (Pair o1 o2) .. o3) (at level 0).

Definition proj_1 {s1 s2 : Set} (p1 : s1 × s2) : s1 :=
  match p1 with
  | (o1, _) => o1
  end.

Notation "'π1'" := proj_1 (at level 0).

Inductive List (s1 : Set) : Set :=
  | Nil : List s1
  | Cons : s1 -> List s1 -> List s1.

Arguments Nil {_}.

Arguments Cons {_} _ _.

Notation "s1 *" := (List s1) (at level 30, no associativity).

Notation "'ε'" := Nil (at level 0).

Notation "o1 ◁ l1" := (Cons o1 l1) (at level 60, right associativity).

Fixpoint map {s1 s2 : Set} (f1 : s1 -> s2) (l1 : s1 *) : s2 * :=
  match l1 with
  | ε => ε
  | o1 ◁ l2 => (f1 o1) ◁ (map f1 l2)
  end.
Taking a list of tuples and returning a tuple

Taking a list of tuples and returning a tuple


By : user3411678
Date : March 29 2020, 07:55 AM
This might help you here's a recursive version. it performs only one pass along the input list. doing two independent passes often causes space leaks.
code :
gather xs = g 0 xs 
  where
  g c []         = (c, [])
  g c ((_,ys):r) = (a, ys ++ b) 
                     where 
                     (a,b) = c `seq` g (c+1) r
How to write a vfprintf wrapper that adds a prefix to format specifier and passes the new format specifier to vfprintf i

How to write a vfprintf wrapper that adds a prefix to format specifier and passes the new format specifier to vfprintf i


By : prabhjeet kaur
Date : March 29 2020, 07:55 AM
it fixes the issue Your pseudocode vfprintf(stderr, "foo: error:" format, args); should be:
code :
fprintf(stderr, "foo: error:");
vfprintf(stderr, format, args);
char *fail = malloc(sizeof "foo: error:" + strlen(format));
if ( !fail )
    exit(EXIT_FAILURE);
strcpy(fail, "foo: error:");
strcat(fail, format);

vfprintf(stderr, fail, args);

free(fail);
format specifier inside format specifier to change size of leading zeros

format specifier inside format specifier to change size of leading zeros


By : yagmurozel
Date : November 27 2020, 12:01 PM
it fixes the issue I was thinking to solve my issue that is described in the following and then I ended with a question that I couldn't find an answer for it on Google. , Yes, it is possible. See * width specifier of printf. Example:
code :
printf("%0*d\n", 5, 2);
00002
TypeError: list indices must be integers or slices, not tuple when list passed into function

TypeError: list indices must be integers or slices, not tuple when list passed into function


By : Xen626
Date : March 29 2020, 07:55 AM
Any of those help There are many logical and run-time errors in your code. Your best strategy is to convert the list of prices to a NumPy array. NumPy has some very handy functions for solving your problem:
code :
import numpy as np
stock_prices = np.array(stock_prices)

def get_max_profit(stock_prices):        
    high_time = stock_prices.argmax()
    low_time = stock_prices.argmin()
    if low_time < high_time:
        return stock_prices.max() - stock_prices.min()
    else:
        return 'Negative Balance'
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