Here's my Python code
thisdict = {
"brand": "Ford",
"model": "Mustang",
"year": 1964
}
thisdict["year"] = 2018
for x in thisdict:
print(x)
It outputs:
brand
model
year
I can't understand the logic!!
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Peter Wood
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Yash
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`for x in thisdict` produces a sequence of dictionary keys. – Peter Wood Sep 15 '18 at 13:56
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Have you searched for "python for in"? There are a million tutorials out there that cover this. – Chris Sep 15 '18 at 13:56
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@PeterWood Which kind of sequence? – Yash Sep 15 '18 at 13:57
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Yash, does it matter what kind of sequence? – Peter Wood Sep 15 '18 at 13:58
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You can see that the output is a list of keys for the dictionary, no? – roganjosh Sep 15 '18 at 13:58
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@Yash: Why should it change anything if you use `y` as a variable name. It's just a name. The main point is: When you loop over a dictionary you'll get back the keys. Whether you store the current key in a variable named `x`, `y` or `foobarbaz` doesn't matter. – Matthias Sep 15 '18 at 14:28
2 Answers
1
for a in b iterates through b by calling iter(b) first to get an iterator of b, and repeatedly calling next() on the iterator and assigning the values to a before running the loop body.
An iterator of a python dictionary generates all its keys, so you're getting all keys of thisdict with x in your loop and printing them.
iBug
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0
The for loop loops through the keys in the dictionary. To loop through and get the values of each key you could do (Try it online):
for x in thisdict:
print(thisdict[x])
and it would output:
Ford
Mustang
2018
Noah Cristino
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