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# GetLexicon
<a name="GetLexiconSamplePython"></a>

以下 Python 代码使用AWS SDK for Python (Boto) 来检索一个 AWS 区域中存储的所有词典。该示例接受词典名称作为命令行参数，并仅获取该词典，打印出词典在本地保存的 tmp 路径。

以下代码示例使用存储在 AWS 软件开发工具包配置文件中的默认凭证。有关创建配置文件的信息，请参阅 [设置AWS CLI](setup-cli.md)。

有关此操作的更多信息，请参阅 [https://docs.aws.amazon.com/polly/latest/dg/API_GetLexicon.html](https://docs.aws.amazon.com/polly/latest/dg/API_GetLexicon.html) API 参考。

```
from argparse import ArgumentParser
from os import path
from tempfile import gettempdir

from boto3 import Session
from botocore.exceptions import BotoCoreError, ClientError

# Define and parse the command line arguments
cli = ArgumentParser(description="GetLexicon example")
cli.add_argument("name", type=str, metavar="LEXICON_NAME")
arguments = cli.parse_args()

# Create a client using the credentials and region defined in the adminuser
# section of the AWS credentials and configuration files
session = Session(profile_name="adminuser")
polly = session.client("polly")

print(u"Fetching {0}...".format(arguments.name))

try:
    # Fetch lexicon by name
    response = polly.get_lexicon(Name=arguments.name)
except (BotoCoreError, ClientError) as error:
    # The service returned an error, exit gracefully
    cli.error(error)

# Get the lexicon data from the response
lexicon = response.get("Lexicon", {})

# Access the lexicon's content
if "Content" in lexicon:
    output = path.join(gettempdir(), u"%s.pls" % arguments.name)
    print(u"Saving to %s..." % output)

    try:
        # Save the lexicon contents to a local file
        with open(output, "w") as pls_file:
            pls_file.write(lexicon["Content"])
    except IOError as error:
        # Could not write to file, exit gracefully
        cli.error(error)
else:
    # The response didn't contain lexicon data, exit gracefully
    cli.error("Could not fetch lexicons contents")

print("Done.")
```