Differences Between Python Single Quotation and Embedded Function str()

The former (s1) is a single quotation that simply declares a string no matter what it is inside.
The latter (s2) has once created an dict object and stringed it with the function.

Because the latter process involves type conversion from dict to str, s1 and s2 are no longer identical strings because the type conversion involves shaping.

Try executing the code below.

s1='{"input":{"action":"read", "role":"User", "request":["gender", "address", "birthDate", "familyName", "telephone"]}'
s2=str({"input":{"action":"read", "role":"User", "request":["gender", "address", "birthDate", "familyName", "telephone"]}})

print(s1==s2)# False

print(s1)#{"input":{"action":"read", "role":"User", "request":["gender", "address", "birthDate", "familyName", "telephone" ]}}
print(s2)#{'input':{'action':'read','role':'User','request':['gender','address','birthDate','familyName','telephone']}}

print(s1==s2.replace(", "", ").replace("", "")#True

If you look at the execution results, you can see that the string changes depending on whether it is shaped or not.

False
{"input":{"action":"read", "role":"User", "request":["gender", "address", "birthDate", "familyName", "telephone" ]}}
{'input': {'action': 'read', 'role': 'User', 'request': ['gender', 'address', 'birthDate', 'familyName', 'telephone']}}
True

Also, you can read the specifications from 3.1.2. String type (string) in the official documentation to see why kukuri characters are replaced with single quotation when shaped.

When an interactive interpreter prints a string, the output string is enclosed in quotation marks and the special characters are escaped with a backslash.Sometimes the output characters look different from the input (the quotation marks surrounding them change), but the two strings are the same.If the string contains single quotes and does not contain double quotes, it is enclosed in double quotes, otherwise it is enclosed in single quotes.

References

• str and single vs double quote behavior in Python

s2 is a dictionary string representation.

If other encoding errors are given, str(object) returns type(object).str(object), which is the "informal" or "nicely printable string presentation of object.

[Quote] embedded --- Python 3 document

Therefore, the contents of the dictionary are slightly shaped and printed.

Here's probably the input/output you'll expect.

>>s1="{'input':{'action':'read', 'role':'User', 'request':['gender', 'address', 'birthDate', 'familyName', 'telephone']}}"
>>s2=str({"input":{"action":"read", "role":"User", "request":["gender", "address", "birthDate", "familyName", "telephone"]}})
>>>s1 == s2
True