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Single line for-loop to build a dictionary?


Single line for-loop to build a dictionary?

By : tinpl
Date : November 22 2020, 10:48 AM
Hope this helps You can use a dict comprehension:
code :
data = {smallItem:smallItem for smallItem in bigList}
data = dict((smallItem, smallItem) for smallItem in bigList)


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Build Dictionary in Python Loop - List and Dictionary Comprehensions

Build Dictionary in Python Loop - List and Dictionary Comprehensions


By : Lucas
Date : March 29 2020, 07:55 AM
help you fix your problem The short form is as follows (called dict comprehension, as analogy to the list comprehension, set comprehension etc.):
code :
x = { row.SITE_NAME : row.LOOKUP_TABLE for row in cursor }
{ _key : _value(_key) for _key in _container }
JAVA help ;Use a while loop to build a string that is a single line consisting of asterisks

JAVA help ;Use a while loop to build a string that is a single line consisting of asterisks


By : Mabedi Bald
Date : March 29 2020, 07:55 AM
Does that help First of all, this compile error would be much easier for you to see for yourself if you use standard code formatting (see code below for standard formatting). The compile error is because if the while loop is never entered your function would never return a value:
code :
public String Question1(int numberOfStars) {
    String str = "*";
    while (numberOfStars > 0) {
        numberOfStars--;
        return str;
    }
    // compiler thinks: "what if the code gets here?"
    // no String would be returned
}
public String Question1(int numberOfStars) {
    String str = "*";
    while (numberOfStars > 0) {
        numberOfStars--;
        return str;
    }
    return "";
}
Python: breaking a for loop in single line for loop & performance of single line vs block-code

Python: breaking a for loop in single line for loop & performance of single line vs block-code


By : WildMan
Date : November 03 2020, 11:01 PM
Any of those help you can replace your whole loop by this oneliner (is this really a oneliner when using if on a single line?):
code :
if any(calcSth(a,b)>60 for a,b in myList): return True
return any(calcSth(a,b)>60 for a,b in myList)
Single line for-loop to build a list of dictionaries with mulitple values

Single line for-loop to build a list of dictionaries with mulitple values


By : Atexide Fabrice
Date : March 29 2020, 07:55 AM
Hope that helps I'm trying to map two arrays together to a list of dictionaries. Like this: , use zip
code :
a_list = [1, 2, 3]
b_list = ["a", "b", "c"]
d = [{"key1": a, "key2": b} for (a, b) in zip(a_list, b_list)]
print(d)  # [{'key1': 1, 'key2': 'a'}, {'key1': 2, 'key2': 'b'}, {'key1': 3, 'key2': 'c'}]
how to write multiple line statement to single line python dictionary

how to write multiple line statement to single line python dictionary


By : user3234421
Date : March 29 2020, 07:55 AM
I hope this helps . I want to write this below code in one line. I have lots of data. so the page goes on. So i want to shrink it. How to make it possible. I know it is possible in python. Help me with some solutions.
code :
keys = ("url", "ip", "language")
values = ("http://example.com", "93.184.216.34", "en")

# if you want to update an existing dict:
data = {}
data.update(zip(keys, values))

# if you just want to create a dict:
data = dict(zip(keys, values))
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