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Date/Time: Sat, 20 Apr 2024 05:46:32 +0000



Post From: Python for Sierra Chart

[2021-06-18 20:09:53]
biconoid - Posts: 5
As per https://docs.python.org/3/library/struct.html there are only three options to unpack 64 bits (8 bytes), i.e. q, Q and d.
What would be correct structure to unpack?

Format C Python Standard
Type Type Size(bytes)
---------------------------------------------------
Q unsigned long long integer 8
q long long integer 8
d double float 8

Also Sierra documentation mentions
Versions prior to 2151, use a double precision floating point type variable to represent Date-Time values.

Just for testing purposes i've tested using q and Q.
$ cat files/data.tsv
Date Open High Low Close Volume NumberOfTrades BidVolume AskVolume
3795467579000000.0 2623.0 0.0 2623.0 2623.0 1 1 1 0
3795948047000000.0 2717.0 0.0 2717.0 2717.0 1 1 1 0
3796150099000000.0 2750.0 0.0 2750.0 2750.0 1 1 1 0
3796636617000000.0 2742.5 2757.75 2742.5 2742.5 1 1 1 0

When unpacking using Q or q.
>>> datetime.fromtimestamp(3795467579)
datetime.datetime(2090, 4, 9, 20, 32, 59)
>>>

and
>>> datetime.fromtimestamp(3795467579000000.0 )
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: year 120275549 == out of range
>>>

Date Time Of Last Edit: 2021-06-18 20:26:19