SequenceRecord Class

SequenceRecord is the lightweight record type returned by SequenceReader.get_records(), holding a single sequence's id, sequence, quality, and source format.

Class Signature

`SequenceRecord`

class SequenceRecord(seq, id, qual, format)

Constructor Parameters:

Name	Type	Default	Description
`seq`	`str`	Required	The sequence string.
`id`	`str`	Required	The record identifier.
`qual`	`str` or `None`	Required	Per-base quality string. `None` for FASTA records, which don't carry quality scores.
`format`	`str`	Required	Source format of the record, e.g. `"Fasta"` or `"Fastq"`.

Direct Construction

SequenceRecord instances are normally produced by SequenceReader.get_records() rather than constructed directly, but the class can be instantiated manually since all four fields are plain, required arguments.

Attributes

All attributes are readable and writable.

Attribute	Type	Description
`seq`	`str`	The sequence string.
`id`	`str`	The record identifier.
`qual`	`str` or `None`	Per-base quality string, or `None` if unavailable (e.g. FASTA records).
`format`	`str`	Source format of the record.

Methods

`.str()`

def __str__() -> str

Returns a human-readable summary of the record, invoked implicitly by str() and print().

ParametersReturns

None

str: A multi-line summary containing id, format, the first 20 characters of seq followed by "...", and qual.

Examples

Constructing a Record Directly and Printing

import dna_parser as dps

record= dps.SequenceRecord("agtcgtcgctttttgc", "Sequence1", qual=None, format= "Fasta")
print(record)

# Output:
#[ID: Sequence1
# Format: Fasta
# Sequence: agtcgtcgctttttgc...
# Quality: None]