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Simultaneous assignment in python 3.3


Simultaneous assignment in python 3.3

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Simultaneous assignment in python 3.3
Tag : python-3.x , By : arbeitandy
Date : December 01 2020, 05:00 PM

it should still fix some issue "input" returns only one value at the time, so you can't really assign it for two variables. If you expect two values you may want to split string by space or any other convenient separator.
>>> x,y = map(int, input("Enter x and y separated by comma: ").split(',', 1))
Enter x and y separated by comma: 1, 2
>>> x
1
>>> y
2

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Simultaneous assignment in Go


Tag : development , By : joshboles
Date : March 29 2020, 07:55 AM
should help you out
It is very easy to make mistakes like a, b = a, b and not a, b = b, a,
tmp = a
a = b
b = tmp

Simultaneous assignment semantics in Python


Tag : python , By : sadboy
Date : March 29 2020, 07:55 AM
Does that help Consider the following Python 3 code: , In this case:
i, a[i] = i + 1, i
>>> a = [0,0,0,0]
>>> i, a[i], i, a[i] = range(4)
>>> a
[1, 0, 3, 0]

Simultaneous variable assignment and printing


Tag : r , By : cthulhup
Date : March 29 2020, 07:55 AM
should help you out I was wondering if there was a way to assign a value and print the value to the console succinctly. , You can try:
(x <- 1:5)
print(x <- 1:5)
(names(x) <- letters[1:5])
(x <- setNames(x, letters[1:5]))

Simultaneous column assignment


Tag : python , By : Sanoran
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You can use ix to set multiple columns at the same time without problem:
In [8]:

df = pd.DataFrame({'a':np.random.randn(5), 'b':np.random.randn(5), 'c':np.random.randn(5)})
df
Out[8]:
          a         b         c
0  0.623686  0.875752  1.027399
1 -0.806096  0.349891  0.290276
2  0.750623  0.704666 -1.401591
3 -0.594068 -1.148006  0.373021
4 -1.060019 -0.325563 -0.536769

In [9]:

df.ix[:,['a','b','c']] = 'total'
df
Out[9]:
       a      b      c
0  total  total  total
1  total  total  total
2  total  total  total
3  total  total  total
4  total  total  total

How to understand this simultaneous assignment evaluation in python 3?


Tag : python-3.x , By : Puneet Madaan
Date : January 02 2021, 06:48 AM
this one helps.
I am not understanding why y = 8 instead of y = 10 despite x = y = 5 being evaluated first
x, y = y, (x+y)
x, y = 3, 5
temp = y, x + y
x, y = temp
>>> import dis
>>> def f(x, y):
...     x, y = y, x + y
...
>>> dis.dis(f)
  2           0 LOAD_FAST                1 (y)
              2 LOAD_FAST                0 (x)
              4 LOAD_FAST                1 (y)
              6 BINARY_ADD
              8 ROT_TWO
             10 STORE_FAST               0 (x)
             12 STORE_FAST               1 (y)
             14 LOAD_CONST               0 (None)
             16 RETURN_VALUE
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