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| import os |
| import re |
| import tiktoken |
| from api.utils.file_utils import get_project_base_directory |
|
|
| def singleton(cls, *args, **kw): |
| instances = {} |
|
|
| def _singleton(): |
| key = str(cls) + str(os.getpid()) |
| if key not in instances: |
| instances[key] = cls(*args, **kw) |
| return instances[key] |
|
|
| return _singleton |
|
|
|
|
| def rmSpace(txt): |
| txt = re.sub(r"([^a-z0-9.,\)>]) +([^ ])", r"\1\2", txt, flags=re.IGNORECASE) |
| return re.sub(r"([^ ]) +([^a-z0-9.,\(<])", r"\1\2", txt, flags=re.IGNORECASE) |
|
|
|
|
| def findMaxDt(fnm): |
| m = "1970-01-01 00:00:00" |
| try: |
| with open(fnm, "r") as f: |
| while True: |
| line = f.readline() |
| if not line: |
| break |
| line = line.strip("\n") |
| if line == 'nan': |
| continue |
| if line > m: |
| m = line |
| except Exception: |
| pass |
| return m |
|
|
| |
| def findMaxTm(fnm): |
| m = 0 |
| try: |
| with open(fnm, "r") as f: |
| while True: |
| line = f.readline() |
| if not line: |
| break |
| line = line.strip("\n") |
| if line == 'nan': |
| continue |
| if int(line) > m: |
| m = int(line) |
| except Exception: |
| pass |
| return m |
|
|
|
|
| tiktoken_cache_dir = get_project_base_directory() |
| os.environ["TIKTOKEN_CACHE_DIR"] = tiktoken_cache_dir |
| |
| encoder = tiktoken.get_encoding("cl100k_base") |
|
|
|
|
| def num_tokens_from_string(string: str) -> int: |
| """Returns the number of tokens in a text string.""" |
| try: |
| return len(encoder.encode(string)) |
| except Exception: |
| return 0 |
|
|
|
|
| def truncate(string: str, max_len: int) -> str: |
| """Returns truncated text if the length of text exceed max_len.""" |
| return encoder.decode(encoder.encode(string)[:max_len]) |
|
|
