<center>![](https://steemitimages.com/p/EEEoA8oLaAxtVnttk7BKQMhRXkrRt8FHqw3nZvGBTSbDiXEyysnzqBxDdLg9XNkgwRqT1aKC47fM48GVLzPFotTDyUX64frd7KDRtYKKiKsSGK5H6vGrtDhh36LqKBVfhr8KfXab3aszWzvEyAatw?format=match&mode=fit&width=640)
<sup>Image: [Timur Saglambilek](https://www.pexels.com/photo/analytics-text-185576/)</sup></center>

Just used a similar variant for another purpose, maybe it's helpful for somebody else as well. This script uses [beem](https://github.com/holgern/beem) to access the blockchain.

```
from beem.blockchain import Blockchain
from datetime import datetime, timedelta
import sys

start_time = datetime(2019, 5, 29)
bc = Blockchain()
start_block = bc.get_estimated_block_num(start_time)
stop_block = bc.get_estimated_block_num(start_time +
                                        timedelta(days=1))
root_authors = set()
comment_authors = set()
voters = set()
transactors = set()
for op in bc.stream(start=start_block, stop=stop_block,
                    max_batch_size=50):
    sys.stdout.write("%s\r" % (op['timestamp']))
    if op['type'] == 'comment':
        if op['parent_author']:
            comment_authors |= set([op['author']])
        else:
            root_authors |= set([op['author']])
    if op['type'] == 'vote':
        voters |= set([op['voter']])
    if op['type'] == 'transfer':
        transactors |= set([op['from']])

print("\nNumber of root authors    : %d" % (len(root_authors)))
print("Number of comment authors : %d" % (len(comment_authors)))
print("Number of voters          : %d" % (len(voters)))
print("Number of transfer senders: %d" % (len(transactors)))
```
A few remarks:
* `blockchain.get_estimated_block_num()` is a nice way to get a block number form a time stamp and is used to find the start and stop blocks.
* The `set()`s are an elegant way to keep track of a list of unique entries, or'ing with `|=` adds new values only if they are not yet contained in the set
* The `sys.stdout.write()` with line-return gives some status info on how far in time the script has the data processed and only little output clutter to the terminal

#### Results for May 29th, 2019

|  |  |
| --- | --- |
| Number of root authors | 6247 |
| Number of comment authors | 4129 |
| Number of voters          | 41559 |
| Number of transfer senders | 2929 |

--- 

Wow, the numbers aren't very promising :/ We had ~8k root posters and ~6k comment authors beginning of the year and more than 10k/8k (root/comment) around Sept. 2018. The number of voters per day also seems to be declining, coming from around 47k at the beginning of the year and >50k in Sept '18. <sup>[number references](https://steemit.com/utopian-io/@crokkon/how-much-of-the-total-steem-sp-is-not-voting-1543014210145)</sup>.