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<@U06RKAMK0UC> how do I read a FlyteFile into a da...
# ask-ai
b
@ancient-wolf-19325 how do I read a FlyteFile into a dataframe?
j
Reasoning Complete! 🤖 🔍 Searched knowledge base: I'll look up the recommended way to read a FlyteFile into a dataframe so I can give you clear instructions. • Searching over 10 data sources from the following: File, Github File, Github Issue, Web • Found 61 documents that could be relevant from the following data sources: Github File, Github Issue, Github Pull Request, Web Content. • Filtered down to the top 30 most relevant documents. ✍️ Generated answer: I have found the recommended way to read a FlyteFile into a dataframe and can now provide you with clear instructions.
To read a FlyteFile into a dataframe, open the FlyteFile using its 
.open()
method and pass the file handle to a dataframe reader such as 
pandas.read_csv()
. For example:
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import pandas as pd
from flytekit.types.file import FlyteFile

@task
def read_flytefile(ff: FlyteFile) -> pd.DataFrame:
    with ff.open("r") as f:
        df = pd.read_csv(f)
    return df
This approach is shown in the Flyte documentation and examples, including streaming support for large files. See file_streaming.py and FlyteFile docs. Would you like more detail or examples for other file formats? Sources: - file_streaming.py - FlyteFile docs 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
b
@ancient-wolf-19325 how to read it into spark dataframe
j
Reasoning Complete! 🤖 🔍 Searched knowledge base: I'll look up the recommended way to read a FlyteFile into a Spark DataFrame so I can give you clear instructions. • Searching over 10 data sources from the following: File, Github File, Github Issue, Web • Found 55 documents that could be relevant from the following data sources: Github File, Github Issue, Github Pull Request, Web Content. • Filtered down to the top 30 most relevant documents. ✍️ Generated answer: I have found the recommended way to read a FlyteFile into a Spark DataFrame and can now provide you with clear instructions.
To read a FlyteFile into a Spark DataFrame, use the Spark session's read method with the FlyteFile's local path. For example:
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from flytekit.types.file import FlyteFile
from flytekit import task
import flytekit

@task
def read_flytefile_spark(ff: FlyteFile):
    spark = flytekit.current_context().spark_session
    df = spark.read.parquet(ff.path)  # or .csv(ff.path) for CSV files
    return df
This method leverages the FlyteFile's 
.path
attribute, which provides the local file path for Spark to read. See dataframe_passing.py for similar usage. Would you like more detail or examples for other formats? Sources: - dataframe_passing.py 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
b
@ancient-wolf-19325 I run into below error when I try to read the file into a spark dataframe
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pyspark.errors.exceptions.connect.AnalysisException: [PATH_NOT_FOUND] Path does not exist:
j
Reasoning Complete! 🤖 🔍 Searched knowledge base: I'll look up common reasons for the PATH_NOT_FOUND error when reading a FlyteFile into a Spark DataFrame, so I can help you resolve this issue. • Searching over 10 data sources from the following: File, Github File, Github Issue, Web • Found 53 documents that could be relevant from the following data sources: Github File, Github Issue, Github Pull Request, Web Content. • Filtered down to the top 30 most relevant documents. ✍️ Generated answer: I have found the root cause and solution for the PATH_NOT_FOUND error when reading a FlyteFile into a Spark DataFrame, and can now provide you with clear instructions.
This error means the file path you provided to Spark does not exist on the filesystem accessible to the Spark driver or executors. With FlyteFile, you must ensure the file is downloaded locally before passing its path to Spark. Use the 
.download()
method to materialize the file:
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local_path = ff.download()
df = spark.read.parquet(local_path)  # or .csv(local_path)
If you use 
ff.path
directly, the file may not be present unless it was already downloaded. See FlyteFile docs for details. Would you like more troubleshooting steps or explanation? Sources: - FlyteFile docs 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
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