"Error: parse error: premature EOF" error when reading n lines from a json file using jsonlite
"Error: parse error: premature EOF" error when reading n lines from a json file using jsonlite
我有一个 3GB json 文件。我想阅读前 1000 行，这样我就可以了解如何清理它。当我使用此代码进行导入时：
json_data <- jsonlite::stream_in(file("2020-04-05-20_cleaned.json"), pagesize = 100)
我得到的错误是：
opening file input connection.
Error: parse error: premature EOF
[{"created_at":"Mon Apr 06 00:0
(right here) ------^
closing file input connection.
“2020-04-05-20_cleaned.json”文件的前几行如下所示：
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由于 SO 字符限制无法添加更多行
如果能得到您的一些意见，我将不胜感激。谢谢！
编辑：
#i have tried this too, lead to same error as above
dat <- readLines("2020-04-05-20_cleaned.json", n = 100 )
jsonlite::stream_in(textConnection(dat))
但是这个：
fromJSON(sprintf("[%s]", paste(readLines("2020-04-05-20_cleaned.json", n = 100), collapse="")))
给我：
Error: parse error: unallowed token at this point in JSON text
mestamp_ms":"1586131489768"},]
(right here) ------^
看了很多帖子，none对我有帮助。
@MrFlick 提到：
stream_in is meant to read data in ndjson format. The leading [ that
only seems to be on the first line and the commas at the end of the
lines makes it seems like that might not be the format you have. It
would probably be better to pre-process your data to get it into the
correct format first.
我意识到有逗号，所以我只是将其从字符串末尾删除，然后使用为我修复的 sprintf 重新制作 json：
pagesize=10
con <- "2020-04-05-20_cleaned.json"
initialJSON = readLines(con, n = pagesize)
collapsedJSON <- paste(initialJSON[2:pagesize], collapse="")
collapsedJSON <- substr(collapsedJSON, 1, nchar(collapsedJSON)-1)
fixedJSON <- sprintf("[%s]", collapsedJSON, collapse=",")
readJSON <- jsonlite::fromJSON(fixedJSON)
给我这样的输出：
# A tibble: 9 x 32
created_at id id_str text source truncated in_reply_to_sta~
<chr> <dbl> <chr> <chr> <chr> <lgl> <lgl>
1 Mon Apr 0~ 1.25e18 12469~ "?? ~ "<a h~ TRUE NA
2 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
3 Mon Apr 0~ 1.25e18 12469~ "Def~ "<a h~ TRUE NA
4 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
5 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
6 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
7 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
8 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
9 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
# ... with 152 more variables: in_reply_to_status_id_str <lgl>,
# in_reply_to_user_id <lgl>, in_reply_to_user_id_str <lgl>,
# in_reply_to_screen_name <lgl>, user$id <dbl>, $id_str <chr>,
# $name <chr>, $screen_name <chr>, $location <chr>, $url <chr>,
# $description <chr>, $translator_type <chr>, $protected <lgl>,
# $verified <lgl>, $followers_count <int>, $friends_count <int>,
# $listed_count <int>, $favourites_count <int>, $statuses_count <int>,
# $created_at <chr>, $utc_offset <lgl>, $time_zone <lgl>,
# $geo_enabled <lgl>, $lang <lgl>, $contributors_enabled <lgl>,
# $is_translator <lgl>, $profile_background_color <chr>,
# $profile_background_image_url <chr>,
# $profile_background_image_url_https <chr>,
# $profile_background_tile <lgl>, $profile_link_color <chr>,
# $profile_sidebar_border_color <chr>, $profile_sidebar_fill_color <chr>,
# $profile_text_color <chr>, $profile_use_background_image <lgl>,
# $profile_image_url <chr>, $profile_image_url_https <chr>,
# $profile_banner_url <chr>, $default_profile <lgl>,
# $default_profile_image <lgl>, $following <lgl>,
# $follow_request_sent <lgl>, $notifications <lgl>, geo <lgl>,
# coordinates <lgl>, place <lgl>, contributors <lgl>,
# is_quote_status <lgl>, extended_tweet$full_text <chr>,
# $display_text_range <list>, $entities$hashtags <list>, $$urls <list>,
# $$user_mentions <list>, $$symbols <list>, $$media <list>,
# $extended_entities$media <list>, quote_count <int>, reply_count <int>,
# retweet_count <int>, favorite_count <int>, entities$hashtags <list>,
# $urls <list>, $user_mentions <list>, $symbols <list>, $media <list>,
# favorited <lgl>, retweeted <lgl>, possibly_sensitive <lgl>,
# filter_level <chr>, lang <chr>, timestamp_ms <chr>,
# retweeted_status$created_at <chr>, $id <dbl>, $id_str <chr>,
# $text <chr>, $source <chr>, $truncated <lgl>,
# $in_reply_to_status_id <lgl>, $in_reply_to_status_id_str <lgl>,
# $in_reply_to_user_id <lgl>, $in_reply_to_user_id_str <lgl>,
# $in_reply_to_screen_name <lgl>, $user$id <dbl>, $$id_str <chr>,
# $$name <chr>, $$screen_name <chr>, $$location <chr>, $$url <chr>,
# $$description <chr>, $$translator_type <chr>, $$protected <lgl>,
# $$verified <lgl>, $$followers_count <int>, $$friends_count <int>,
# $$listed_count <int>, $$favourites_count <int>, $$statuses_count <int>,
# $$created_at <chr>, $$utc_offset <lgl>, $$time_zone <lgl>, ...
感谢 MrFlick 的帮助。
我有一个 3GB json 文件。我想阅读前 1000 行，这样我就可以了解如何清理它。当我使用此代码进行导入时：
json_data <- jsonlite::stream_in(file("2020-04-05-20_cleaned.json"), pagesize = 100)
我得到的错误是：
opening file input connection.
Error: parse error: premature EOF
[{"created_at":"Mon Apr 06 00:0
(right here) ------^
closing file input connection.
“2020-04-05-20_cleaned.json”文件的前几行如下所示：
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由于 SO 字符限制无法添加更多行
如果能得到您的一些意见，我将不胜感激。谢谢！
编辑：
#i have tried this too, lead to same error as above
dat <- readLines("2020-04-05-20_cleaned.json", n = 100 )
jsonlite::stream_in(textConnection(dat))
但是这个：
fromJSON(sprintf("[%s]", paste(readLines("2020-04-05-20_cleaned.json", n = 100), collapse="")))
给我：
Error: parse error: unallowed token at this point in JSON text
mestamp_ms":"1586131489768"},]
(right here) ------^
看了很多帖子，none对我有帮助。
@MrFlick 提到：
stream_inis meant to read data inndjsonformat. The leading[that only seems to be on the first line and the commas at the end of the lines makes it seems like that might not be the format you have. It would probably be better to pre-process your data to get it into the correct format first.
我意识到有逗号，所以我只是将其从字符串末尾删除，然后使用为我修复的 sprintf 重新制作 json：
pagesize=10
con <- "2020-04-05-20_cleaned.json"
initialJSON = readLines(con, n = pagesize)
collapsedJSON <- paste(initialJSON[2:pagesize], collapse="")
collapsedJSON <- substr(collapsedJSON, 1, nchar(collapsedJSON)-1)
fixedJSON <- sprintf("[%s]", collapsedJSON, collapse=",")
readJSON <- jsonlite::fromJSON(fixedJSON)
给我这样的输出：
# A tibble: 9 x 32
created_at id id_str text source truncated in_reply_to_sta~
<chr> <dbl> <chr> <chr> <chr> <lgl> <lgl>
1 Mon Apr 0~ 1.25e18 12469~ "?? ~ "<a h~ TRUE NA
2 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
3 Mon Apr 0~ 1.25e18 12469~ "Def~ "<a h~ TRUE NA
4 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
5 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
6 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
7 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
8 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
9 Mon Apr 0~ 1.25e18 12469~ "RT ~ "<a h~ FALSE NA
# ... with 152 more variables: in_reply_to_status_id_str <lgl>,
# in_reply_to_user_id <lgl>, in_reply_to_user_id_str <lgl>,
# in_reply_to_screen_name <lgl>, user$id <dbl>, $id_str <chr>,
# $name <chr>, $screen_name <chr>, $location <chr>, $url <chr>,
# $description <chr>, $translator_type <chr>, $protected <lgl>,
# $verified <lgl>, $followers_count <int>, $friends_count <int>,
# $listed_count <int>, $favourites_count <int>, $statuses_count <int>,
# $created_at <chr>, $utc_offset <lgl>, $time_zone <lgl>,
# $geo_enabled <lgl>, $lang <lgl>, $contributors_enabled <lgl>,
# $is_translator <lgl>, $profile_background_color <chr>,
# $profile_background_image_url <chr>,
# $profile_background_image_url_https <chr>,
# $profile_background_tile <lgl>, $profile_link_color <chr>,
# $profile_sidebar_border_color <chr>, $profile_sidebar_fill_color <chr>,
# $profile_text_color <chr>, $profile_use_background_image <lgl>,
# $profile_image_url <chr>, $profile_image_url_https <chr>,
# $profile_banner_url <chr>, $default_profile <lgl>,
# $default_profile_image <lgl>, $following <lgl>,
# $follow_request_sent <lgl>, $notifications <lgl>, geo <lgl>,
# coordinates <lgl>, place <lgl>, contributors <lgl>,
# is_quote_status <lgl>, extended_tweet$full_text <chr>,
# $display_text_range <list>, $entities$hashtags <list>, $$urls <list>,
# $$user_mentions <list>, $$symbols <list>, $$media <list>,
# $extended_entities$media <list>, quote_count <int>, reply_count <int>,
# retweet_count <int>, favorite_count <int>, entities$hashtags <list>,
# $urls <list>, $user_mentions <list>, $symbols <list>, $media <list>,
# favorited <lgl>, retweeted <lgl>, possibly_sensitive <lgl>,
# filter_level <chr>, lang <chr>, timestamp_ms <chr>,
# retweeted_status$created_at <chr>, $id <dbl>, $id_str <chr>,
# $text <chr>, $source <chr>, $truncated <lgl>,
# $in_reply_to_status_id <lgl>, $in_reply_to_status_id_str <lgl>,
# $in_reply_to_user_id <lgl>, $in_reply_to_user_id_str <lgl>,
# $in_reply_to_screen_name <lgl>, $user$id <dbl>, $$id_str <chr>,
# $$name <chr>, $$screen_name <chr>, $$location <chr>, $$url <chr>,
# $$description <chr>, $$translator_type <chr>, $$protected <lgl>,
# $$verified <lgl>, $$followers_count <int>, $$friends_count <int>,
# $$listed_count <int>, $$favourites_count <int>, $$statuses_count <int>,
# $$created_at <chr>, $$utc_offset <lgl>, $$time_zone <lgl>, ...
感谢 MrFlick 的帮助。