def merge(stringlist): new = [] skip = False for first, second in zip(stringlist, (stringlist[1:] + ['#'])): if skip: skip = False elif second.startswith('#'): new.append(f'{first}{second.lstrip("#")}') skip = True else: new.append(first) skip = False return new ['...
Method 2: Converting a list of strings into a string using .join() The .join() method concatenates the elements of an iterable into a single string, provided all elements are strings. In the following example, we’ll show you how to combine list comprehensions and .join() for lists with...
277 278 """ 279 return s.rstrip(chars) 280 281 282 # Split a string into a list of space/tab-separated words 283 def split(s, sep=None, maxsplit=-1): 284 """split(s [,sep [,maxsplit]]) -> list of strings 285 286 Return a list of the words in the string s, using sep ...
TypeError:notenough argumentsforformat string The special symbols %s and %d are placeholders(占位符)for strings and (decimal) integers. We can embed these inside a string, then use the % operator to combine them. Let’s unpack this code further, in order to see this behavior up close(近距...
strings=['Hello','World','Python']chained_strings=list(chain(*strings))print(','.join(chained_strings))# Output: Hello,World,Python Copy MethodDescriptionPerformanceSuitable For join()Concatenates a list of strings into a single string with a specified delimiter.Efficient for string-specific opera...
DataFrame.aggregate(func[, axis]) #Aggregate using callable, string, dict, or list of string/callables DataFrame.transform(func, *args, **kwargs) #Call function producing a like-indexed NDFrame DataFrame.groupby([by, axis, level, …]) #分组 ...
combine keys values set_axis isnull sparse first_valid_index combine_first ewm notnull empty mask truncate to_csv bool at clip radd to_markdown value_counts first isna between_time replace sample idxmin div iloc add_suffix pipe to_sql items max rsub flags sem to_string to_excel prod ...
Map returns an interator from a list y = map(lambda i: i ** 2, list) decorator装饰器 装饰器是把一个要执行的函数包含在wrapper函数里面,并且在要执行的函数前后去执行代码 classmethod和staticmethod staticmethod不需要已经实例化的类的函数来作为输入,可以传入任何东西。method中不使用self就不会改变class ...
bpe.train(words,21)# Print the corpus at each stage of the process, and the merge rule usedprint(f'INITIAL CORPUS:\n{bpe.corpus_history[0]}\n')forrule, corpusinlist(zip(bpe.merge_rules, bpe.corpus_history[1:])):print(f'NEW MERGE RULE: Combine "{rule[0]}" and "{rule[1]}"'...
方法描述DataFrame.apply(func[, axis, broadcast, …])应用函数DataFrame.applymap(func)Apply a function to a DataFrame that is intended to operate elementwise, i.e.DataFrame.aggregate(func[, axis])Aggregate using callable, string, dict, or list of string/callablesDataFrame.transform(func, *args,...