Japanese characters in Flask

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Hi!
I want to iterate through this dictionary in Flask:

hiragana_dict = {"a": u"\u3042", "i": u"\u3044", "u": u"\u3046", "e": u"\u3048", "o": u"\u304A", 
"ka": u"\u304B", "ki": u"\u304D", "ku": u"\u304F", "ke": u"\u3051", "ko": u"\u3053",
"sa": u"\u3055", "shi": u"\u3057", "su": u"\u3059", "se": u"\u305B", "so": u"\u305D",
"ta": u"\u305F", "chi": u"\u3061", "tsu": u"\u3064", "te": u"\u3066", "to": u"\u3068",
"na": u"\u306A", "ni": u"\u306B", "nu": u"\u306C", "ne": u"\u306D", "no": u"\u306E",
"ha": u"\u306F", "hi": u"\u3072", "fu": u"\u3075", "he": u"\u3078", "ho": u"\u307B",
"ma": u"\u307E", "mi": u"\u307F", "mu": u"\u3080", "me": u"\u3081", "mo": u"\u3082",
"ya": u"\u3084", "yu": u"\u3086", "yo": u"\u3088",
"ra": u"\u3089", "ri": u"\u308A", "ru": u"\u308B", "re": u"\u308C", "ro": u"\u308D",
"wa": u"\u308F", "wo": u"\u3092", "n": u"\u3093"}

The loop works just fine in Python script in IDE, but when I try to use it in Flask, I get SyntaxError:

Error:
File "C:\Users\Ewa\Desktop\KanaSite\kana\kana_app.py", line 28
    hiragana_dict = {"a": u"\u3042", "i": u"\u3044", "u": u"\u3046", "e": u"\u3048", "o": u"\u304A",
    ^
SyntaxError: invalid syntax

(line 28 is just where the dictionary starts)
I tried adding # -*- coding: utf-8 -*- comment, importing unicodedata and using Japanese characters instead of code points (found those solutions somewhere on the internet), but nothing worked.

How can I display Japanese characters on the website using Flask? Thanks in advance!