我刚看到一些DLib代码，在.cpp文件中就是这样的：
#include <stdio>
namespace {
using namespace std;
void foo() {
::std::vector<int> my_vector;
}
}
我们是否有理由在::std::已经从vector导入的std前面指定import avro.schema
import io, random
from avro.io import DatumWriter, DatumReader
import avro.io
# Path to user.avsc avro schema
schema_path="user.avsc"
schema = avro.schema.Parse(open(schema_path).read())
for i in xrange(1):
writer = avro.io.DatumWriter(schema)
bytes_writer = io.BytesIO()
encoder = avro.io.BinaryEncoder(bytes_writer)
writer.write({"name": "123", "favorite_color": "111", "favorite_number": random.randint(0,10)}, encoder)
raw_bytes = bytes_writer.getvalue()
print(raw_bytes)
bytes_reader = io.BytesIO(raw_bytes)
decoder = avro.io.BinaryDecoder(bytes_reader)
reader = avro.io.DatumReader(schema)
user1 = reader.read(decoder)
print(" USER = {}".format(user1))
？