Feather是一个快速、轻量级的存储框架，可以在应用在pandas的Dataframe数据结构中。
读写数据
import feather
import pandas as pd
def read_csv_feature(file_in):
f = open(file_in, encoding='utf-8')
reader = pd.read_csv(f, sep=',',iterator=True)
loop = True
chunkSize= 10000
chunks = []
while loop:
try:
chunk = reader.get_chunk(chunkSize)
chunks.append(chunk)
except StopIteration:
loop = False
print('Iteration is stopped')
df = pd.concat(chunks, ignore_index=True)
return df
def write_csv_feature(file_in, file_out):
df = read_csv_feature(file_in)
print(df.count())
feather = feather.write_dataframe(df, file_out)
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